Property Portfolio - Gross Investment (Details)

v3.19.3

Property Portfolio - Gross Investment (Details) - USD ($) $ in Thousands													9 Months Ended
	Sep. 26, 2019	Aug. 23, 2019	Aug. 14, 2019	Aug. 06, 2019	Aug. 05, 2019	Aug. 01, 2019	Jul. 12, 2019	Aug. 03, 2018	Jul. 03, 2018	Mar. 01, 2018	Feb. 23, 2018	Feb. 09, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Beginning Balance													$ 647,550	$ 471,507
Site and tenant improvements													508	2,043
Capitalized costs													54		$ 139
Acquisitions													182,896	141,530
Ending Balance													830,446	613,037
Zachary [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													4,683
Gilbert and Chandler [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													16,259
Las Vegas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													22,502
Oklahoma Northwest [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													28,207
Mishawaka [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													16,103
Surprise [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													28,682
San Marcos [Member]
Property, Plant and Equipment [Line Items]
Acquisitions							$ 12,000						11,974
Lansing [Member]
Property, Plant and Equipment [Line Items]
Acquisitions						$ 11,100							11,368
Bannockburn [Member]
Property, Plant and Equipment [Line Items]
Acquisitions					$ 6,600								6,689
Aurora [Member]
Property, Plant and Equipment [Line Items]
Acquisitions				$ 12,600									12,557
Livonia [Member]
Property, Plant and Equipment [Line Items]
Acquisitions			$ 10,400										10,592
Gilbert [Member]
Property, Plant and Equipment [Line Items]
Acquisitions		$ 5,600											5,592
Morgantown [Member]
Property, Plant and Equipment [Line Items]
Acquisitions	$ 8,000												7,950
ASC 842 Reclassification [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													(824)
Moline / Silvis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														7,100
Freemont [Member]
Property, Plant and Equipment [Line Items]
Acquisitions												$ 8,500		8,497
Gainesville [Member]
Property, Plant and Equipment [Line Items]
Acquisitions											$ 10,500			10,510
Dallas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions										$ 23,300				23,284
Orlando [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														16,414
Belpre [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														64,683
McAllen [Member]
Property, Plant and Equipment [Line Items]
Acquisitions									$ 5,400					5,395
Derby [Member]
Property, Plant and Equipment [Line Items]
Acquisitions								$ 3,600						3,604
Land [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance													63,710	42,701
Site and tenant improvements													0	0
Capitalized costs													0
Acquisitions													23,168	14,138
Ending Balance													86,878	56,839
Land [Member] | Zachary [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													0
Land [Member] | Gilbert and Chandler [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													4,616
Land [Member] | Las Vegas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,479
Land [Member] | Oklahoma Northwest [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,364
Land [Member] | Mishawaka [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,924
Land [Member] | Surprise [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,738
Land [Member] | San Marcos [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,322
Land [Member] | Lansing [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,202
Land [Member] | Bannockburn [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													731
Land [Member] | Aurora [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,521
Land [Member] | Livonia [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													980
Land [Member] | Gilbert [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,408
Land [Member] | Morgantown [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													883
Land [Member] | ASC 842 Reclassification [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													0
Land [Member] | Moline / Silvis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Land [Member] | Freemont [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														162
Land [Member] | Gainesville [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														625
Land [Member] | Dallas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														6,272
Land [Member] | Orlando [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														2,543
Land [Member] | Belpre [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														3,025
Land [Member] | McAllen [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														1,099
Land [Member] | Derby [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														412
Building [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance													518,451	384,338
Site and tenant improvements													0
Capitalized costs													54
Acquisitions													119,054	109,165
Ending Balance													637,505	493,503
Building [Member] | Zachary [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													3,336
Building [Member] | Gilbert and Chandler [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													11,643
Building [Member] | Las Vegas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													15,277
Building [Member] | Oklahoma Northwest [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													19,501
Building [Member] | Mishawaka [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													10,084
Building [Member] | Surprise [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													18,737
Building [Member] | San Marcos [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													6,934
Building [Member] | Lansing [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													7,681
Building [Member] | Bannockburn [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													3,419
Building [Member] | Aurora [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													7,446
Building [Member] | Livonia [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													7,629
Building [Member] | Gilbert [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,027
Building [Member] | Morgantown [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													5,286
Building [Member] | ASC 842 Reclassification [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													0
Building [Member] | Moline / Silvis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														4,895
Building [Member] | Freemont [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														8,335
Building [Member] | Gainesville [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														9,885
Building [Member] | Dallas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														17,012
Building [Member] | Orlando [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														11,720
Building [Member] | Belpre [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														50,526
Building [Member] | McAllen [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														4,296
Building [Member] | Derby [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														2,496
Building And Tenant Improvements [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance													22,237	12,818
Site and tenant improvements													508	2,043
Capitalized costs													0
Acquisitions													18,328	8,224
Ending Balance													40,565	21,042
Building And Tenant Improvements [Member] | Zachary [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													512
Building And Tenant Improvements [Member] | Gilbert and Chandler [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													0
Building And Tenant Improvements [Member] | Las Vegas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,449
Building And Tenant Improvements [Member] | Oklahoma Northwest [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													3,187
Building And Tenant Improvements [Member] | Mishawaka [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,872
Building And Tenant Improvements [Member] | Surprise [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													4,347
Building And Tenant Improvements [Member] | San Marcos [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													530
Building And Tenant Improvements [Member] | Lansing [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													852
Building And Tenant Improvements [Member] | Bannockburn [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,214
Building And Tenant Improvements [Member] | Aurora [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													911
Building And Tenant Improvements [Member] | Livonia [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													643
Building And Tenant Improvements [Member] | Gilbert [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													424
Building And Tenant Improvements [Member] | Morgantown [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													879
Building And Tenant Improvements [Member] | ASC 842 Reclassification [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													0
Building And Tenant Improvements [Member] | Moline / Silvis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														1,216
Building And Tenant Improvements [Member] | Freemont [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Building And Tenant Improvements [Member] | Gainesville [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Building And Tenant Improvements [Member] | Dallas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Building And Tenant Improvements [Member] | Orlando [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														756
Building And Tenant Improvements [Member] | Belpre [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														3,966
Building And Tenant Improvements [Member] | McAllen [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Building And Tenant Improvements [Member] | Derby [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														243
Intangibles [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance													43,152	31,650
Site and tenant improvements													0	0
Capitalized costs													0
Acquisitions													22,346	10,003
Ending Balance													65,498	41,653
Intangibles [Member] | Zachary [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													835
Intangibles [Member] | Gilbert and Chandler [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													0
Intangibles [Member] | Las Vegas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,297
Intangibles [Member] | Oklahoma Northwest [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													3,155
Intangibles [Member] | Mishawaka [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,223
Intangibles [Member] | Surprise [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													3,860
Intangibles [Member] | San Marcos [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,188
Intangibles [Member] | Lansing [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,633
Intangibles [Member] | Bannockburn [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,325
Intangibles [Member] | Aurora [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													2,679
Intangibles [Member] | Livonia [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													1,340
Intangibles [Member] | Gilbert [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													733
Intangibles [Member] | Morgantown [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													902
Intangibles [Member] | ASC 842 Reclassification [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													$ (824)
Intangibles [Member] | Moline / Silvis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														989
Intangibles [Member] | Freemont [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Intangibles [Member] | Gainesville [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Intangibles [Member] | Dallas [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Intangibles [Member] | Orlando [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														1,395
Intangibles [Member] | Belpre [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														7,166
Intangibles [Member] | McAllen [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														0
Intangibles [Member] | Derby [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														$ 453