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

Real Estate and Intangible Assets - Summary of Properties Acquired (Detail)

Real Estate and Intangible Assets - Summary of Properties Acquired (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	9 Months Ended
	Nov. 30, 2005	Sep. 30, 2014 sqft	Sep. 30, 2013 sqft Option
Business Acquisition [Line Items]
Square Footage		1,406,054	829,132
Renewal options			2
Renewal options period			5 years
Total Purchase Price	$ 5,300	$ 93,711	$ 108,888
Acquisition Expenses		1,114	653
Annualized Straight Line Rent		9,490	10,658
Debt Issued		43,781	56,100
Allen, TX [Member]
Business Acquisition [Line Items]
Acquisition Date		Mar. 27, 2014	Jul. 10, 2013
Square Footage		21,154	115,200
Lease Term		12 years	11 years 6 months
Renewal options		4	2
Renewal options period		5 years	5 years
Total Purchase Price		5,525	15,150
Acquisition Expenses		33	81
Annualized Straight Line Rent		570	1,918
Debt Issued		3,481	8,900
Colleyville, TX [Member]
Business Acquisition [Line Items]
Acquisition Date		Mar. 27, 2014
Square Footage		20,355
Lease Term		12 years
Renewal options		4
Renewal options period		5 years
Total Purchase Price		4,523
Acquisition Expenses		33
Annualized Straight Line Rent		467
Debt Issued		2,849
Rancho Cordova, CA [Member]
Business Acquisition [Line Items]
Acquisition Date		Apr. 22, 2014
Square Footage		61,358
Lease Term		10 years
Renewal options		1
Renewal options period		5 years
Total Purchase Price		8,225
Acquisition Expenses		73
Annualized Straight Line Rent		902
Debt Issued		4,935
Coppell, TX [Member]
Business Acquisition [Line Items]
Acquisition Date		May 08, 2014
Square Footage		21,171
Lease Term		12 years
Renewal options		4
Renewal options period		5 years
Total Purchase Price		5,838
Acquisition Expenses		26
Annualized Straight Line Rent		601
Debt Issued		3,816
Columbus, OH [Member]
Business Acquisition [Line Items]
Acquisition Date		May 13, 2014
Square Footage		114,786
Lease Term		9 years 6 months
Total Purchase Price		11,800
Acquisition Expenses		70
Annualized Straight Line Rent		1,278
Taylor, PA [Member]
Business Acquisition [Line Items]
Acquisition Date		Jun. 09, 2014
Square Footage		955,935
Lease Term		10 years
Renewal options		4
Renewal options period		5 years
Total Purchase Price		39,000
Acquisition Expenses		730
Annualized Straight Line Rent		3,400
Debt Issued		22,600
Aurora, CO [Member]
Business Acquisition [Line Items]
Acquisition Date		Jul. 01, 2014
Square Footage		124,800
Lease Term		15 years
Renewal options		2
Renewal options period		5 years
Total Purchase Price		8,300
Acquisition Expenses		91
Annualized Straight Line Rent		768
Indianapolis, IN [Member]
Business Acquisition [Line Items]
Acquisition Date		Sep. 03, 2014
Square Footage		86,495
Lease Term		11 years 6 months
Renewal options		2
Renewal options period		5 years
Total Purchase Price		10,500
Acquisition Expenses		58
Annualized Straight Line Rent		1,504
Debt Issued		6,100
Egg Harbor Township, NJ [Member]
Business Acquisition [Line Items]
Acquisition Date			Mar. 28, 2013
Square Footage			29,257
Lease Term			10 years
Renewal options			1
Renewal options period			5 years
Total Purchase Price			5,650
Acquisition Expenses			152
Annualized Straight Line Rent			490
Debt Issued			3,700
Clintonville, WI [Member]
Business Acquisition [Line Items]
Acquisition Date			Apr. 11, 2013
Square Footage			102,400
Lease Term			15 years
Total Purchase Price			3,250
Annualized Straight Line Rent			961
Vance, AL [Member]
Business Acquisition [Line Items]
Acquisition Date			May 08, 2013
Square Footage			170,000
Lease Term			10 years
Renewal options			2
Renewal options period			5 years
Total Purchase Price			13,388
Acquisition Expenses			186
Annualized Straight Line Rent			1,173
Blaine, MN [Member]
Business Acquisition [Line Items]
Acquisition Date			May 10, 2013
Square Footage			92,275
Lease Term			6 years 10 months 24 days
Renewal options			2
Renewal options period			5 years
Total Purchase Price			14,450
Acquisition Expenses			79
Annualized Straight Line Rent			1,475
Debt Issued			8,200
Austin, Texas [Member]
Business Acquisition [Line Items]
Acquisition Date			Jul. 09, 2013
Square Footage			320,000
Lease Term			8 years
Renewal options			3
Renewal options period			3 years
Total Purchase Price			57,000
Acquisition Expenses			155
Annualized Straight Line Rent			4,641
Debt Issued			$ 35,300