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	3 Months Ended
	Mar. 31, 2015 sqft	Mar. 31, 2014 sqft
Business Acquisition [Line Items]
Square Footage (unaudited)	186,834good_AreaOfRealEstateProperties	41,509good_AreaOfRealEstateProperties
Total Purchase Price	$ 28,348good_PurchasePrice	$ 10,048good_PurchasePrice
Acquisition Expenses	169good_BusinessAcquisitionExpenses	52good_BusinessAcquisitionExpenses
Annualized Straight Line Rent	3,041good_AnnualizedStraightLineRent	1,037good_AnnualizedStraightLineRent
Debt Issued & Assumed	14,573	6,330
Richardson, TX [Member]
Business Acquisition [Line Items]
Acquisition Date	Mar. 06, 2015
Square Footage (unaudited)	155,984
Lease Term	9 years 6 months
Renewal Options	2
Renewal Options Period	5 years
Total Purchase Price	24,700
Acquisition Expenses	103
Annualized Straight Line Rent	2,708
Debt Issued & Assumed	14,573
Birmingham, AL [Member]
Business Acquisition [Line Items]
Acquisition Date	Mar. 20, 2015
Square Footage (unaudited)	30,850
Lease Term	8 years 6 months
Renewal Options	1
Renewal Options Period	5 years
Total Purchase Price	3,648
Acquisition Expenses	66
Annualized Straight Line Rent	333
Allen, TX [Member]
Business Acquisition [Line Items]
Acquisition Date		Mar. 27, 2014
Square Footage (unaudited)		21,154
Lease Term		12 years
Renewal Options		4
Renewal Options Period		5 years
Total Purchase Price		5,525
Acquisition Expenses		26
Annualized Straight Line Rent		570
Debt Issued & Assumed		3,481
Colleyville, TX [Member]
Business Acquisition [Line Items]
Acquisition Date		Mar. 27, 2014
Square Footage (unaudited)		20,355
Lease Term		12 years
Renewal Options		4
Renewal Options Period		5 years
Total Purchase Price		4,523
Acquisition Expenses		26
Annualized Straight Line Rent		467
Debt Issued & Assumed		$ 2,849