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	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Below market leases and deferred revenue, lease intangibles	$ (64,907)	$ (48,241)
Below market leases and deferred revenue, accumulated amortization	24,206	21,471
Lease Intangibles
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	261,719	259,300
Accumulated Amortization	(148,726)	(144,806)
In-place leases
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	105,827	105,891
Accumulated Amortization	(63,850)	(62,604)
Leasing costs
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	84,802	81,487
Accumulated Amortization	(45,430)	(43,982)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	71,090	71,922
Accumulated Amortization	(39,446)	(38,220)
Above market leases
Finite-Lived Intangible Assets [Line Items]
Lease Intangibles	15,371	15,538
Accumulated Amortization	$ (11,707)	$ (11,520)