Annual report pursuant to Section 13 and 15(d)

Property Portfolio (Gross Investment) (Details)

v3.19.1
Property Portfolio (Gross Investment) (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 16, 2018
Oct. 12, 2018
Aug. 03, 2018
Jul. 03, 2018
Mar. 02, 2018
Dec. 19, 2018
Oct. 30, 2018
Feb. 23, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]                      
Beginning Balance                 $ 471,507 $ 206,877  
Tenant improvements                 2,535 0 $ 0
Acquisitions                 200,680 [1] 264,630 [2]  
Disposition of Great Bend                 (24,637)    
Ending Balance                 647,550 471,507 206,877
Cape Coral Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   7,369  
Lewisburg facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   7,300  
Las Cruces Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,014  
Prescott Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   4,612  
Clermont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,435  
Moline / Silvis Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Tenant improvements [3]                 2,568    
Acquisitions                 7,100    
Freemont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 8,497    
Gainesville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions               $ 10,500 10,510    
Dallas Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions         $ 23,300       23,284    
Orlando Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 16,414    
Belpre Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 64,683    
McAllen Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions       $ 5,400         5,395    
Derby Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions     $ 3,600           3,604    
Bountiful Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions   $ 4,900             4,905    
Cincinnati Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions             $ 4,000   4,126    
Melbourne Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions $ 7,700               7,719    
Southern IL Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 14,490    
Vernon Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions           $ 10,900     11,095    
Corona Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 16,290    
Sandusky Facility Acquisition One [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   4,407  
Great Bend Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   24,638  
Oklahoma City Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   49,500  
Sandusky Facility Acquisition Two [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,076  
Brockport Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   9,085  
Flower Mound Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   4,292  
Sherman facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   26,612  
Sandusky Facility Acquisition Three [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,271  
Lubbock Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   8,200  
Germantown Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   15,940  
Austin Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   40,650  
Fort Worth Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   6,250  
Albertville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   6,800  
Moline Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   12,007  
Lees Summit Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   3,937  
Amarillo [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   8,691  
Wyomissing [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,737  
Saint George [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,807  
Land [Member]                      
Property, Plant and Equipment [Line Items]                      
Beginning Balance                 42,701 17,786  
Acquisitions                 21,845 [1] 24,915 [2]  
Disposition of Great Bend                 (836)    
Ending Balance                 63,710 42,701 17,786
Land [Member] | Cape Coral Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   352  
Land [Member] | Lewisburg facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   471  
Land [Member] | Las Cruces Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   396  
Land [Member] | Prescott Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   791  
Land [Member] | Clermont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Land [Member] | Moline / Silvis Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Tenant improvements [3]                 0    
Acquisitions                 0    
Land [Member] | Freemont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 162    
Land [Member] | Gainesville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 625    
Land [Member] | Dallas Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 6,272    
Land [Member] | Orlando Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 2,543    
Land [Member] | Belpre Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 3,025    
Land [Member] | McAllen Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,099    
Land [Member] | Derby Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 412    
Land [Member] | Bountiful Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 720    
Land [Member] | Cincinnati Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,745    
Land [Member] | Melbourne Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 645    
Land [Member] | Southern IL Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,830    
Land [Member] | Vernon Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,166    
Land [Member] | Corona Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,601    
Land [Member] | Sandusky Facility Acquisition One [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   409  
Land [Member] | Great Bend Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   837  
Land [Member] | Oklahoma City Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   2,087  
Land [Member] | Sandusky Facility Acquisition Two [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   98  
Land [Member] | Brockport Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   413  
Land [Member] | Flower Mound Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   581  
Land [Member] | Sherman facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,601  
Land [Member] | Sandusky Facility Acquisition Three [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   56  
Land [Member] | Lubbock Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,303  
Land [Member] | Germantown Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   2,700  
Land [Member] | Austin Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   6,958  
Land [Member] | Fort Worth Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,487  
Land [Member] | Albertville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   866  
Land [Member] | Moline Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   722  
Land [Member] | Lees Summit Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   428  
Land [Member] | Amarillo [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,437  
Land [Member] | Wyomissing [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   487  
Land [Member] | Saint George [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   435  
Building [Member]                      
Property, Plant and Equipment [Line Items]                      
Beginning Balance                 384,338 179,253  
Acquisitions                 157,914 [1] 205,085 [2]  
Disposition of Great Bend                 (23,801)    
Ending Balance                 518,451 384,338 179,253
Building [Member] | Cape Coral Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   7,017  
Building [Member] | Lewisburg facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,819  
Building [Member] | Las Cruces Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   4,618  
Building [Member] | Prescott Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   3,821  
Building [Member] | Clermont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   4,361  
Building [Member] | Moline / Silvis Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Tenant improvements [3]                 0    
Acquisitions                 4,895    
Building [Member] | Freemont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 8,335    
Building [Member] | Gainesville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 9,885    
Building [Member] | Dallas Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 17,012    
Building [Member] | Orlando Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 11,720    
Building [Member] | Belpre Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 50,526    
Building [Member] | McAllen Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 4,296    
Building [Member] | Derby Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 2,496    
Building [Member] | Bountiful Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 4,185    
Building [Member] | Cincinnati Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,336    
Building [Member] | Melbourne Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 5,950    
Building [Member] | Southern IL Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 12,660    
Building [Member] | Vernon Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 9,929    
Building [Member] | Corona Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 14,689    
Building [Member] | Sandusky Facility Acquisition One [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   3,998  
Building [Member] | Great Bend Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   23,801  
Building [Member] | Oklahoma City Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   37,714  
Building [Member] | Sandusky Facility Acquisition Two [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   978  
Building [Member] | Brockport Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   6,885  
Building [Member] | Flower Mound Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   2,922  
Building [Member] | Sherman facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   25,011  
Building [Member] | Sandusky Facility Acquisition Three [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,215  
Building [Member] | Lubbock Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,042  
Building [Member] | Germantown Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   8,078  
Building [Member] | Austin Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   28,508  
Building [Member] | Fort Worth Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   3,334  
Building [Member] | Albertville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   3,486  
Building [Member] | Moline Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   8,175  
Building [Member] | Lees Summit Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   2,426  
Building [Member] | Amarillo [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   7,254  
Building [Member] | Wyomissing [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,250  
Building [Member] | Saint George [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   5,372  
Site And Tenant Improvements [Member]                      
Property, Plant and Equipment [Line Items]                      
Beginning Balance                 12,818 2,651  
Acquisitions                 9,419 [1] 10,167 [2]  
Disposition of Great Bend                 0    
Ending Balance                 22,237 12,818 2,651
Site And Tenant Improvements [Member] | Cape Coral Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Lewisburg facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   505  
Site And Tenant Improvements [Member] | Las Cruces Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Prescott Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Clermont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   206  
Site And Tenant Improvements [Member] | Moline / Silvis Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Tenant improvements [3]                 2,568    
Acquisitions                 1,216    
Site And Tenant Improvements [Member] | Freemont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Site And Tenant Improvements [Member] | Gainesville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Site And Tenant Improvements [Member] | Dallas Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Site And Tenant Improvements [Member] | Orlando Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 756    
Site And Tenant Improvements [Member] | Belpre Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 3,966    
Site And Tenant Improvements [Member] | McAllen Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                    
Site And Tenant Improvements [Member] | Derby Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 243    
Site And Tenant Improvements [Member] | Bountiful Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Site And Tenant Improvements [Member] | Cincinnati Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 553    
Site And Tenant Improvements [Member] | Melbourne Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 117    
Site And Tenant Improvements [Member] | Southern IL Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Site And Tenant Improvements [Member] | Vernon Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Site And Tenant Improvements [Member] | Corona Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Site And Tenant Improvements [Member] | Sandusky Facility Acquisition One [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Great Bend Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Oklahoma City Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,876  
Site And Tenant Improvements [Member] | Sandusky Facility Acquisition Two [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Brockport Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   492  
Site And Tenant Improvements [Member] | Flower Mound Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   382  
Site And Tenant Improvements [Member] | Sherman facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Sandusky Facility Acquisition Three [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Lubbock Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   947  
Site And Tenant Improvements [Member] | Germantown Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   657  
Site And Tenant Improvements [Member] | Austin Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,373  
Site And Tenant Improvements [Member] | Fort Worth Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   643  
Site And Tenant Improvements [Member] | Albertville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,246  
Site And Tenant Improvements [Member] | Moline Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,194  
Site And Tenant Improvements [Member] | Lees Summit Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   646  
Site And Tenant Improvements [Member] | Amarillo [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Wyomissing [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Site And Tenant Improvements [Member] | Saint George [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member]                      
Property, Plant and Equipment [Line Items]                      
Beginning Balance                 31,650 7,187  
Acquisitions                 11,502 [1] 24,463 [2]  
Disposition of Great Bend                 0    
Ending Balance                 43,152 31,650 $ 7,187
Intangibles [Member] | Cape Coral Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Lewisburg facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   505  
Intangibles [Member] | Las Cruces Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Prescott Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Clermont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   868  
Intangibles [Member] | Moline / Silvis Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Tenant improvements [3]                 0    
Acquisitions                 989    
Intangibles [Member] | Freemont Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Intangibles [Member] | Gainesville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Intangibles [Member] | Dallas Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Intangibles [Member] | Orlando Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,395    
Intangibles [Member] | Belpre Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 7,166    
Intangibles [Member] | McAllen Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                    
Intangibles [Member] | Derby Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 453    
Intangibles [Member] | Bountiful Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Intangibles [Member] | Cincinnati Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 492    
Intangibles [Member] | Melbourne Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 1,007    
Intangibles [Member] | Southern IL Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Intangibles [Member] | Vernon Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 0    
Intangibles [Member] | Corona Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                 $ 0    
Intangibles [Member] | Sandusky Facility Acquisition One [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Great Bend Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Oklahoma City Facilities [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   7,823  
Intangibles [Member] | Sandusky Facility Acquisition Two [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Brockport Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,295  
Intangibles [Member] | Flower Mound Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   407  
Intangibles [Member] | Sherman facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Sandusky Facility Acquisition Three [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Lubbock Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   908  
Intangibles [Member] | Germantown Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   4,505  
Intangibles [Member] | Austin Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   3,811  
Intangibles [Member] | Fort Worth Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   786  
Intangibles [Member] | Albertville Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,202  
Intangibles [Member] | Moline Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   1,916  
Intangibles [Member] | Lees Summit Facility [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   437  
Intangibles [Member] | Amarillo [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Wyomissing [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   0  
Intangibles [Member] | Saint George [Member]                      
Property, Plant and Equipment [Line Items]                      
Acquisitions                   $ 0  
[1] The Belpre, Southern IL, and Corona acquisitions included an aggregate of $16,362 of OP Units issued as part of the total consideration for those transactions. As indicated in footnote (1) above, $2,535 of completed construction-in-process costs were reclassified to investment in real estate during the year ended December 31, 2018. Additionally, an aggregate of $946 of intangible liabilities were acquired from the acquisitions that occurred during the year ended December 31, 2018. Accordingly, the total addition to gross investment in real estate funded with cash was $180,837.
[2] The Lubbock and Moline facility acquisitions included an aggregate of approximately $11,300 of OP Units issued as part of the total consideration. Additionally, an aggregate of $1,110 of intangible liabilities were acquired from the acquisitions that occurred during the year ended December 31, 2017, resulting in total gross investments funded using cash of $252,220
[3] Represents tenant improvements that were completed and placed in service during the year ended December 31, 2018 related to the Silvis and Sherman facilities that were acquired in January 2018 and June 2017, respectively. Of the $2,568, there were $2,535 of costs recorded as construction-in-process within the “Other Assets” line item in the Company’s Consolidated Balance Sheet when incurred and reclassified to investment in real estate once completed, and $33 of costs that were incurred and paid in cash and recorded directly as tenant improvements.