Quarterly report pursuant to Section 13 or 15(d)

Property Portfolio (Gross Investment) (Details)

v3.10.0.1
Property Portfolio (Gross Investment) (Details) - USD ($)
$ in Thousands
 1 Months Ended 6 Months Ended
Mar. 02, 2018
Feb. 23, 2018
Jun. 30, 2018
Property, Plant and Equipment [Line Items]      
Beginning Balance     $ 471,507
Acquisitions     130,502
Ending Balance     602,009
Moline / Silvis Facility [Member]      
Property, Plant and Equipment [Line Items]      
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     64,697
Land [Member]      
Property, Plant and Equipment [Line Items]      
Beginning Balance     42,701
Acquisitions     12,629
Ending Balance     55,330
Land [Member] | Moline / Silvis Facility [Member]      
Property, Plant and Equipment [Line Items]      
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     3,027
Building [Member]      
Property, Plant and Equipment [Line Items]      
Beginning Balance     384,338
Acquisitions     102,428
Ending Balance     486,766
Building [Member] | Moline / Silvis Facility [Member]      
Property, Plant and Equipment [Line Items]      
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     50,581
Site And Tenant Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Beginning Balance     12,818
Acquisitions     5,933
Ending Balance     18,751
Site And Tenant Improvements [Member] | Moline / Silvis Facility [Member]      
Property, Plant and Equipment [Line Items]      
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     3,961
Intangibles [Member]      
Property, Plant and Equipment [Line Items]      
Beginning Balance     31,650
Acquisitions     9,512
Ending Balance     41,162
Intangibles [Member] | Moline / Silvis Facility [Member]      
Property, Plant and Equipment [Line Items]      
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     $ 7,128