Gladstone Commercial Corporation Annual report pursuant to Section 13 and 15(d)

Real Estate and Intangible Assets - Pro-Forma Condensed Consolidated Statements of Operations (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Impairment loss	$ 600		$ 14,000	$ 622	$ 14,238
Gain on debt extinguishment		$ 5,300			5,274
Roseville [Member]
Business Acquisition [Line Items]
Impairment loss				14,200	14,200
Gain on debt extinguishment					$ 5,300
Dayton Ohio [Member]
Business Acquisition [Line Items]
Impairment loss				$ 600