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 (Detail)

Real Estate and Intangible Assets - Carrying Value of Intangible Assets and Accumulated Amortization (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Below market leases and deferred revenue, gross	$ (17,273)	$ (17,951)
Below market leases and deferred revenue, accumulated amortization	8,110	8,294
Above and Below Market Leases and Deferred Revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets (liabilities), gross	(7,097)	(7,775)
Finite-lived intangible assets (liabilities), accumulated amortization	1,174	1,476
Above Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	10,176	10,176
Finite-lived intangible assets, accumulated amortization	(6,936)	(6,818)
In-Place Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	65,882	66,244
Finite-lived intangible assets, accumulated amortization	(23,941)	(22,679)
Leasing Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	44,415	44,360
Finite-lived intangible assets, accumulated amortization	(15,760)	(14,774)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	46,468	46,485
Finite-lived intangible assets, accumulated amortization	(15,493)	(14,722)
Lease Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	156,765	157,089
Finite-lived intangible assets, accumulated amortization	$ (55,194)	$ (52,175)