Property Portfolio - Gross Investment (Details)

v3.22.0.1

Property Portfolio - Gross Investment (Details) - USD ($) $ in Thousands																																			12 Months Ended
	Dec. 20, 2021	Dec. 16, 2021	Dec. 13, 2021	Dec. 03, 2021	Sep. 30, 2021	Sep. 15, 2021	Jul. 29, 2021	Jul. 28, 2021	Jun. 02, 2021	Apr. 21, 2021	Apr. 19, 2021	Apr. 16, 2021	Apr. 13, 2021	Apr. 06, 2021	Mar. 09, 2021	Jan. 15, 2021	Jan. 12, 2021	Dec. 30, 2020	Dec. 29, 2020	Dec. 14, 2020	Dec. 01, 2020	Nov. 23, 2020	Nov. 18, 2020	Oct. 27, 2020	Oct. 20, 2020	Sep. 30, 2020	Sep. 18, 2020	Jul. 31, 2020	Jul. 17, 2020	Jul. 16, 2020	Mar. 20, 2020	Mar. 04, 2020	Feb. 27, 2020	Feb. 13, 2020	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Beginning Balance																																			$ 1,142,905	$ 905,529
Acquisitions																																			204,710	237,376
Capitalized costs																																			10,887	1,799
Disposition of Great Bend																																			(4,612)
Ending Balance																																			1,343,003	1,142,905
High Point Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		$ 25,100		25,081
Clinton Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																	$ 11,600			11,619
West Allis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																$ 9,100				9,357
Grand Rapids Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																															$ 22,700					22,794
Dumfries [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				22,040
Centerville Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																														$ 5,100						5,071
Fairfax Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																													$ 17,900							19,745
Rosedale Facilities [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																												$ 23,100								23,891
Lancaster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																											$ 6,300									6,305
Winston-Salem Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																										$ 8,500										9,240
Decatur and Jackson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																									$ 10,900											10,912
Sheboygan and Plymouth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																								$ 13,800												13,824
Spring Hill and Hudson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																							$ 18,200													18,218
Cape Girardeau Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																						$ 7,400														7,350
Yuma Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																					$ 7,000															6,979
Las Vegas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																				$ 7,100																7,124
Pensacola Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																			$ 9,100																	9,052
Venice Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																		$ 7,000																		6,975
El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																	$ 10,000																		10,017
Syracuse Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																$ 6,200																			6,397
West El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																$ 9,600																			9,578
Fort Worth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions															$ 17,400																				17,444
Port St. Lucie Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions														$ 4,800																					4,787
Cape Coral and Fort Myers Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													$ 31,700																						31,701
Dallas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions												$ 6,400																							6,719
East Grand Forks Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions											$ 9,700																								10,278
Coos Bay Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions										$ 6,500																									6,472
Caledonia Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions									$ 3,900																										3,910
Tallahassee Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions									$ 9,200																										9,244
Forsyth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions								$ 19,300																											19,424
North Charleston Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions							$ 7,200																												7,180
Munster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions						$ 6,700																													6,736
Hialeah Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions					$ 11,700																														11,844
Athens Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions					$ 5,300																														5,339
Lemoyne Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions				$ 5,200																															5,336
Athens 200 Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions			$ 2,000																																2,043
Mentor Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions		$ 10,300																																	10,469
Oklahoma City Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions	$ 8,900																																		8,905
Tenant improvements																																			6,814
Land [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance																																			128,857	95,381
Acquisitions																																			23,994	33,476
Disposition of Great Bend																																			(791)
Ending Balance																																			152,060	128,857
Land [Member] | High Point Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,749
Land [Member] | Clinton Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				664
Land [Member] | West Allis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				974
Land [Member] | Grand Rapids Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,951
Land [Member] | Dumfries [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,597
Land [Member] | Fairfax Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				6,731
Land [Member] | Rosedale Facilities [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,856
Land [Member] | Lancaster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				696
Land [Member] | Winston-Salem Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,524
Land [Member] | Decatur and Jackson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,237
Land [Member] | Sheboygan and Plymouth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,088
Land [Member] | Spring Hill and Hudson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				3,473
Land [Member] | Cape Girardeau Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,150
Land [Member] | Yuma Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,041
Land [Member] | Las Vegas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				311
Land [Member] | Pensacola Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,786
Land [Member] | Venice Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,648
Land [Member] | El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			899
Land [Member] | Syracuse Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			616
Land [Member] | West El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			851
Land [Member] | Fort Worth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,817
Land [Member] | Port St. Lucie Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			590
Land [Member] | Cape Coral and Fort Myers Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			5,623
Land [Member] | Dallas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			3,101
Land [Member] | East Grand Forks Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			845
Land [Member] | Coos Bay Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			861
Land [Member] | Caledonia Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			582
Land [Member] | Tallahassee Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			782
Land [Member] | Forsyth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,554
Land [Member] | North Charleston Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			927
Land [Member] | Munster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			780
Land [Member] | Athens Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			564
Land [Member] | Lemoyne Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			299
Land [Member] | Athens 200 Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			327
Land [Member] | Mentor Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			2,249
Land [Member] | Oklahoma City Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			727
Buildings
Property, Plant and Equipment [Line Items]
Beginning Balance																																			851,427	693,533
Acquisitions																																			137,485	157,894
Capitalized costs																																			8,756	1,230
Disposition of Great Bend																																			(3,821)
Ending Balance																																			985,091	851,427
Buildings | High Point Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				20,367
Buildings | Clinton Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				6,551
Buildings | West Allis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				7,687
Buildings | Grand Rapids Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				17,341
Buildings | Dumfries [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				10,047
Buildings | Centerville Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				4,202
Buildings | Fairfax Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				6,642
Buildings | Rosedale Facilities [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				16,204
Buildings | Lancaster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				4,269
Buildings | Winston-Salem Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				6,407
Buildings | Decatur and Jackson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				7,140
Buildings | Sheboygan and Plymouth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				11,212
Buildings | Spring Hill and Hudson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				12,520
Buildings | Cape Girardeau Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				4,601
Buildings | Yuma Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				4,715
Buildings | Las Vegas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				6,813
Buildings | Pensacola Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				5,742
Buildings | Venice Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				4,204
Buildings | El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			7,549
Buildings | Syracuse Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			4,745
Buildings | West El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			7,160
Buildings | Fort Worth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			13,020
Buildings | Port St. Lucie Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			3,583
Buildings | Cape Coral and Fort Myers Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			20,155
Buildings | Dallas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			2,593
Buildings | East Grand Forks Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			6,248
Buildings | Coos Bay Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			5,095
Buildings | Caledonia Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			2,669
Buildings | Tallahassee Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			6,720
Buildings | Forsyth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			9,627
Buildings | North Charleston Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			4,248
Buildings | Munster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			4,451
Buildings | Hialeah Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			9,633
Buildings | Athens Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			4,106
Buildings | Lemoyne Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			3,661
Buildings | Athens 200 Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,336
Buildings | Mentor Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			6,291
Buildings | Oklahoma City Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			5,839
Site Improvements [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance																																			15,183	9,912
Acquisitions																																			3,838	5,271
Capitalized costs																																			495	203
Ending Balance																																			19,021	15,183
Site Improvements [Member] | High Point Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				440
Site Improvements [Member] | Clinton Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				342
Site Improvements [Member] | West Allis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				137
Site Improvements [Member] | Grand Rapids Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				470
Site Improvements [Member] | Dumfries [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				289
Site Improvements [Member] | Centerville Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				160
Site Improvements [Member] | Fairfax Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				381
Site Improvements [Member] | Rosedale Facilities [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				567
Site Improvements [Member] | Lancaster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				110
Site Improvements [Member] | Winston-Salem Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				254
Site Improvements [Member] | Decatur and Jackson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				284
Site Improvements [Member] | Sheboygan and Plymouth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				253
Site Improvements [Member] | Spring Hill and Hudson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				420
Site Improvements [Member] | Cape Girardeau Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				73
Site Improvements [Member] | Yuma Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				309
Site Improvements [Member] | Pensacola Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				332
Site Improvements [Member] | Venice Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				247
Site Improvements [Member] | El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			71
Site Improvements [Member] | Syracuse Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			128
Site Improvements [Member] | West El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			144
Site Improvements [Member] | Fort Worth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			143
Site Improvements [Member] | Port St. Lucie Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			70
Site Improvements [Member] | Cape Coral and Fort Myers Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			480
Site Improvements [Member] | Dallas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			63
Site Improvements [Member] | East Grand Forks Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			278
Site Improvements [Member] | Coos Bay Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			56
Site Improvements [Member] | Caledonia Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			66
Site Improvements [Member] | Tallahassee Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			137
Site Improvements [Member] | Forsyth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			348
Site Improvements [Member] | North Charleston Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			106
Site Improvements [Member] | Munster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			161
Site Improvements [Member] | Hialeah Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			264
Site Improvements [Member] | Athens Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			58
Site Improvements [Member] | Lemoyne Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			113
Site Improvements [Member] | Athens 200 Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			42
Site Improvements [Member] | Mentor Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			354
Site Improvements [Member] | Oklahoma City Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			261
Tenant improvements [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance																																			49,204	33,909
Acquisitions																																			9,696	15,295
Capitalized costs																																			1,636	194
Ending Balance																																			58,900	49,204
Tenant improvements [Member] | High Point Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				869
Tenant improvements [Member] | Clinton Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,578
Tenant improvements [Member] | West Allis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				98
Tenant improvements [Member] | Grand Rapids Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				450
Tenant improvements [Member] | Dumfries [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				4,815
Tenant improvements [Member] | Centerville Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				208
Tenant improvements [Member] | Fairfax Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,979
Tenant improvements [Member] | Rosedale Facilities [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,443
Tenant improvements [Member] | Lancaster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				116
Tenant improvements [Member] | Winston-Salem Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				307
Tenant improvements [Member] | Decatur and Jackson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				296
Tenant improvements [Member] | Sheboygan and Plymouth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				225
Tenant improvements [Member] | Spring Hill and Hudson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				435
Tenant improvements [Member] | Cape Girardeau Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				264
Tenant improvements [Member] | Yuma Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				274
Tenant improvements [Member] | Pensacola Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				411
Tenant improvements [Member] | Venice Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				333
Tenant improvements [Member] | El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			160
Tenant improvements [Member] | Syracuse Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			136
Tenant improvements [Member] | West El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			567
Tenant improvements [Member] | Fort Worth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			395
Tenant improvements [Member] | Port St. Lucie Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			185
Tenant improvements [Member] | Cape Coral and Fort Myers Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,132
Tenant improvements [Member] | Dallas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			469
Tenant improvements [Member] | East Grand Forks Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			815
Tenant improvements [Member] | Coos Bay Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			50
Tenant improvements [Member] | Caledonia Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			96
Tenant improvements [Member] | Tallahassee Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			387
Tenant improvements [Member] | Forsyth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			456
Tenant improvements [Member] | North Charleston Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			801
Tenant improvements [Member] | Munster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			391
Tenant improvements [Member] | Hialeah Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			716
Tenant improvements [Member] | Athens Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			63
Tenant improvements [Member] | Lemoyne Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			359
Tenant improvements [Member] | Athens 200 Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			134
Tenant improvements [Member] | Mentor Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			253
Tenant improvements [Member] | Oklahoma City Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			495
Intangibles [Member]
Property, Plant and Equipment [Line Items]
Beginning Balance																																			98,234	72,794
Acquisitions																																			29,697	25,440
Capitalized costs																																				172
Ending Balance																																			127,931	98,234
Intangibles [Member] | High Point Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,656
Intangibles [Member] | Clinton Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,484
Intangibles [Member] | West Allis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				461
Intangibles [Member] | Grand Rapids Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,582
Intangibles [Member] | Dumfries [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				4,292
Intangibles [Member] | Centerville Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				501
Intangibles [Member] | Fairfax Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				3,012
Intangibles [Member] | Rosedale Facilities [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,821
Intangibles [Member] | Lancaster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,114
Intangibles [Member] | Winston-Salem Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				748
Intangibles [Member] | Decatur and Jackson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				955
Intangibles [Member] | Sheboygan and Plymouth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,046
Intangibles [Member] | Spring Hill and Hudson Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,370
Intangibles [Member] | Cape Girardeau Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,262
Intangibles [Member] | Yuma Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				640
Intangibles [Member] | Pensacola Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				781
Intangibles [Member] | Venice Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				$ 543
Intangibles [Member] | El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,338
Intangibles [Member] | Syracuse Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			772
Intangibles [Member] | West El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			856
Intangibles [Member] | Fort Worth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			2,069
Intangibles [Member] | Port St. Lucie Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			359
Intangibles [Member] | Cape Coral and Fort Myers Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			4,311
Intangibles [Member] | Dallas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			493
Intangibles [Member] | East Grand Forks Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			2,092
Intangibles [Member] | Coos Bay Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			410
Intangibles [Member] | Caledonia Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			497
Intangibles [Member] | Tallahassee Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,218
Intangibles [Member] | Forsyth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			7,439
Intangibles [Member] | North Charleston Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,098
Intangibles [Member] | Munster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			953
Intangibles [Member] | Hialeah Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,231
Intangibles [Member] | Athens Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			548
Intangibles [Member] | Lemoyne Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			904
Intangibles [Member] | Athens 200 Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			204
Intangibles [Member] | Mentor Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			1,322
Intangibles [Member] | Oklahoma City Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																			$ 1,583