Gladstone Commercial Corporation Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Carrying Value of Intangible Assets and Accumulated Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Below market leases and deferred revenue, lease intangibles	$ (63,100)	$ (66,138)
Below market leases and deferred revenue, accumulated amortization	27,339	26,141
Lease Intangibles
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	246,234	259,018
Accumulated Amortization	(141,795)	(147,396)
In-place leases
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	99,022	104,394
Accumulated Amortization	(61,538)	(63,240)
Leasing costs
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	82,946	85,038
Accumulated Amortization	(44,538)	(45,501)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	64,266	69,586
Accumulated Amortization	(35,719)	(38,655)
Above market leases
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	13,826	15,371
Accumulated Amortization	$ (10,663)	$ (11,909)