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

Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail)

Subsequent Events - Monthly Distributions Declared by Company's Board of Directors (Detail) (USD $)	0 Months Ended
	Jan. 07, 2014
Subsequent Event A [Member]
Schedule Of Performance Share Units Activity [Line Items]
Record Date	Jan. 22, 2014
Payment Date	Jan. 31, 2014
Payable to the Holders of Records During the Month	January
Subsequent Event A [Member] \| Common Stock [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1250000
Subsequent Event B [Member]
Schedule Of Performance Share Units Activity [Line Items]
Record Date	Feb. 19, 2014
Payment Date	Feb. 28, 2014
Payable to the Holders of Records During the Month	February
Subsequent Event B [Member] \| Common Stock [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1250000
Subsequent Event C [Member]
Schedule Of Performance Share Units Activity [Line Items]
Record Date	Mar. 17, 2014
Payment Date	Mar. 31, 2014
Payable to the Holders of Records During the Month	March
Subsequent Event C [Member] \| Common Stock [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1250000
Subsequent Event [Member] \| Common Stock [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.3750000
Senior Common Stock [Member] \| Subsequent Event A [Member]
Schedule Of Performance Share Units Activity [Line Items]
Payment Date	Feb. 07, 2014
Distribution per Share	$ 0.0875
Senior Common Stock [Member] \| Subsequent Event B [Member]
Schedule Of Performance Share Units Activity [Line Items]
Payment Date	Mar. 07, 2014
Distribution per Share	$ 0.0875
Senior Common Stock [Member] \| Subsequent Event C [Member]
Schedule Of Performance Share Units Activity [Line Items]
Payment Date	Apr. 07, 2014
Distribution per Share	$ 0.0875
Senior Common Stock [Member] \| Subsequent Event [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.2625
Series A Preferred Stock [Member] \| Subsequent Event A [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1614583
Series A Preferred Stock [Member] \| Subsequent Event B [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1614583
Series A Preferred Stock [Member] \| Subsequent Event C [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1614583
Series A Preferred Stock [Member] \| Subsequent Event [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.4843749
Series B Preferred Stock [Member] \| Subsequent Event A [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1562500
Series B Preferred Stock [Member] \| Subsequent Event B [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1562500
Series B Preferred Stock [Member] \| Subsequent Event C [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1562500
Series B Preferred Stock [Member] \| Subsequent Event [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.4687500
Series C Preferred Stock [Member] \| Subsequent Event A [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1484375
Series C Preferred Stock [Member] \| Subsequent Event B [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1484375
Series C Preferred Stock [Member] \| Subsequent Event C [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.1484375
Series C Preferred Stock [Member] \| Subsequent Event [Member]
Schedule Of Performance Share Units Activity [Line Items]
Distribution per Share	$ 0.4453125