Property Portfolio - (Details)

v3.21.2

Property Portfolio - (Details) $ in Thousands																																3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($) lease	Sep. 15, 2021 USD ($) lease tenant	Jul. 29, 2021 USD ($)	Jul. 28, 2021 USD ($) lease building	Jun. 02, 2021 USD ($) lease	Apr. 21, 2021 USD ($)	Apr. 19, 2021 USD ($) lease property	Apr. 16, 2021 USD ($) lease	Apr. 13, 2021 USD ($) lease property	Apr. 06, 2021 USD ($) lease	Mar. 09, 2021 USD ($)	Jan. 15, 2021 USD ($) lease property	Jan. 12, 2021 USD ($) lease	Dec. 30, 2020 USD ($) lease property item	Dec. 29, 2020 USD ($) tenant lease property	Dec. 14, 2020 USD ($) lease property	Dec. 01, 2020 USD ($) lease property	Nov. 23, 2020 USD ($)	Nov. 18, 2020 USD ($) property lease	Oct. 27, 2020 USD ($) tenant property lease	Oct. 20, 2020 USD ($) property lease tenant	Sep. 30, 2020 USD ($) lease	Sep. 18, 2020 USD ($)	Jul. 31, 2020 USD ($) tenant lease	Jul. 17, 2020 USD ($)	Jul. 16, 2020 USD ($)	Apr. 27, 2020 USD ($)	Mar. 20, 2020 USD ($) building lease	Mar. 04, 2020 USD ($)	Feb. 27, 2020 USD ($)	Feb. 13, 2020 USD ($)	Sep. 30, 2021 USD ($) lease	Sep. 30, 2020 USD ($) lease	Sep. 30, 2021 USD ($) item lease tenant	Sep. 30, 2020 USD ($) lease	Dec. 31, 2020 USD ($) item	Jul. 09, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | item																																		16		18
Depreciation, Total																																$ 8,639	$ 6,954	$ 24,779	$ 19,383
Tenant Improvement Allowances Receivable	$ 28,900																															28,900		28,900
Capital Lease Obligations, Noncurrent	$ 23,900																															$ 23,900		23,900
Acquisitions											$ 17,400																							$ 168,604		$ 237,376
Debt Instrument, Term																																		4 years 6 months 10 days		2 years 9 months 14 days
Number of tenants | tenant																																		177
Total identifiable net liabilities																																					$ 251
Weighted average remaining term	40 years																															40 years		40 years
Commercial mortgage-backed securities (CMBS)
Property, Plant and Equipment [Line Items]
Debt Instrument, Face Amount																											$ 12,100
Debt Instrument, Interest Rate, Stated Percentage																											4.68%
Debt Instrument, Term																											4 years
Lease Intangibles Asset [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life																																		5 years 2 months 12 days
Lease Intangibles Liability [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life																																		4 years 2 months 12 days
Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		$ 20,392		$ 33,476
El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions													$ 10,000																					10,017
Number or leases assumed | lease													3
Lessor, Operating Lease, Term of Contract													4 years
El Paso Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		899
Syracuse Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions												$ 6,200																						6,397
Number or leases assumed | lease												2
Lessor, Operating Lease, Term of Contract												8 years
Syracuse Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		616
West El Paso Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property												2
Acquisitions												$ 9,600																						9,578
Number of new leases entered into | lease												2
Lessor, Operating Lease, Term of Contract												12 years
Leases with tenant renewal options | lease												3
Weighted average remaining term												7 years
West El Paso Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		851
Fort Worth Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		17,444
Weighted average remaining term											8 years
Fort Worth Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		1,817
Port St. Lucie Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions										$ 4,800																								4,787
Number or leases assumed | lease										2
Weighted average remaining term										6 years
Port St. Lucie Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		590
Cape Coral and Fort Myers Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property									6
Acquisitions									$ 31,700																									31,701
Number or leases assumed | lease									6
Weighted average remaining term									5 years
Cape Coral and Fort Myers Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		5,623
Dallas Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions								$ 6,400																										6,719
Number or leases assumed | lease								2
Weighted average remaining term								7 years
Dallas Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		3,101
East Grand Forks Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property							2
Acquisitions							$ 9,700																											10,278
Number or leases assumed | lease							2
Weighted average remaining term							4 years
East Grand Forks Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		845
Coos Bay Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions						$ 6,500																												6,472
Weighted average remaining term						3 years
Coos Bay Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		861
Caledonia Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions					$ 3,900																													3,910
Number or leases assumed | lease					4
Weighted average remaining term					4 years
Caledonia Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		582
Tallahassee Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions					$ 9,200																													9,244
Number or leases assumed | lease					2
Weighted average remaining term					9 years
Tallahassee Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		782
Forsyth Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | building				2
Acquisitions				$ 19,300																														19,424
Number or leases assumed | lease				6
Weighted average remaining term				10 years
Forsyth Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		1,554
North Charleston Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions			$ 7,200																															7,180
Lessor, Operating Lease, Term of Contract			15 years
North Charleston Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		927
Munster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions		$ 6,700																																6,736
Number or leases assumed | lease		5
Number of new leases entered into | lease		3
Number of tenants assumed | tenant		5
Number of tenants | tenant		3
Weighted average remaining term		7 years
Munster Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		780
Hialeah Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions	$ 11,700																																	$ 11,844
Number or leases assumed | lease	42																															42		42
Lessee, Operating Lease, Term of Contract	39 years																															39 years		39 years
Weighted average remaining term	2 years																															2 years		2 years
Athens Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions	$ 5,300																																	$ 5,339
Weighted average remaining term	3 years																															3 years		3 years
Athens Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																		$ 564
High Point Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																															$ 25,100					25,081
Lessor, Operating Lease, Term of Contract																															3 years
High Point Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,749
Clinton Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																														$ 11,600						11,619
Lessor, Operating Lease, Term of Contract																														4 years
Clinton Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				664
West Allis Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																													$ 9,100							9,357
Lessor, Operating Lease, Term of Contract																													4 years
West Allis Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				974
Grand Rapids Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | building																												4
Acquisitions																												$ 22,700								22,794
Number or leases assumed | lease																												11
Lessor, Operating Lease, Term of Contract																												5 years
Grand Rapids Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,951
Dumfries Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																											$ 19,600
Lessor, Operating Lease, Term of Contract																											9 years 6 months
Centerville Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																										$ 5,100										5,071
Lessor, Operating Lease, Term of Contract																										10 years 6 months
Centerville Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Weighted average remaining term																										49 years
Fairfax Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																									$ 17,900											19,745
Lessor, Operating Lease, Term of Contract																									9 years 1 month 6 days
Fairfax Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				6,731
Rosedale Facilities [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																								$ 23,100												23,891
Debt Instrument, Face Amount																								$ 14,800
Debt Instrument, Interest Rate, Stated Percentage																								3.85%
Debt Instrument, Term																								5 years
Number or leases assumed | lease																								8
Number of tenants assumed | tenant																								6
Lessor, Operating Lease, Term of Contract																								6 years 7 months 6 days
Rosedale Facilities [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,856
Lancaster Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																							$ 6,300													6,305
Lessor, Operating Lease, Term of Contract																							8 years 6 months
Lancaster Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				696
Winston-Salem Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																						$ 8,500														9,240
Number or leases assumed | lease																						5											5		5
Lessor, Operating Lease, Term of Contract																						4 years											4 years		4 years
Winston-Salem Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,524
Decatur and Jackson Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																					2
Acquisitions																					$ 10,900															10,912
Number or leases assumed | lease																					6
Number of tenants assumed | tenant																					5
Weighted average remaining term																					6 years
Decatur and Jackson Facility [Member] | Decatur [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																					1
Decatur and Jackson Facility [Member] | Jackson [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																					1
Decatur and Jackson Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				2,237
Sheboygan and Plymouth Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																				2
Acquisitions																				$ 13,800																13,824
Number or leases assumed | lease																				3
Number of tenants assumed | tenant																				2
Weighted average remaining term																				5 years
Sheboygan and Plymouth Facility [Member] | Sheboygan [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																				1
Sheboygan and Plymouth Facility [Member] | Plymouth [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																				1
Sheboygan and Plymouth Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,088
Spring Hill and Hudson Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																			3
Acquisitions																			$ 18,200																	18,218
Number or leases assumed | lease																			3
Lessor, Operating Lease, Term of Contract																			8 years
Spring Hill and Hudson Facility [Member] | Spring Hill [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																			2
Spring Hill and Hudson Facility [Member] | Hudson [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																			1
Spring Hill and Hudson Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				3,473
Cape Girardeau Facility [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																		$ 7,400																		7,350
Lessor, Operating Lease, Term of Contract																		6 years
Cape Girardeau Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,150
Yuma Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																	2
Acquisitions																	$ 7,000																			6,979
Number or leases assumed | lease																	2
Weighted average remaining term																	4 years
Yuma Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,041
Las Vegas Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property																2
Acquisitions																$ 7,100																				7,124
Number of new leases entered into | lease																2
Lessor, Operating Lease, Term of Contract																12 years
Las Vegas Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				311
Pensacola Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property															3
Acquisitions															$ 9,100																					9,052
Number or leases assumed | lease															3
Number of tenants assumed | tenant															2
Weighted average remaining term															9 years
Pensacola Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				1,786
Venice Facility [Member]
Property, Plant and Equipment [Line Items]
Number of Properties Acquired | property														2
Acquisitions														$ 7,000																						6,975
Number or leases assumed | lease														2
Lessor, Operating Lease, Term of Contract														5 years 6 months
Leases with tenant renewal options | item														0
Venice Facility [Member] | Land [Member]
Property, Plant and Equipment [Line Items]
Acquisitions																																				$ 1,648