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

Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

Subsequent Events - Additional Information (Detail) $ in Thousands				6 Months Ended		12 Months Ended
	Jul. 15, 2015 USD ($) ft² Option	Jul. 13, 2015 USD ($) ft² Option	Jul. 01, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Subsequent Event [Line Items]
Principal repayments on mortgage notes payable				$ 23,625	$ 4,182
Lease commission to be paid				291	765
Acquisition Expenses				391	$ 924
Interest Rate Cap [Member]
Subsequent Event [Line Items]
Hedge contract, cost				$ 31		$ 31
Hedge contract, maturity date				Dec. 01, 2016
LIBOR Cap				3.00%
Mortgage Notes Payable [Member]
Subsequent Event [Line Items]
Debt instrument original maturity date				Sep. 01, 2015
Subsequent Event [Member] \| Interest Rate Cap [Member]
Subsequent Event [Line Items]
Hedge contract, cost			$ 70
Hedge contract, maturity date			Jul. 01, 2018
Hedge contract, interest rate description			We will receive payments from Synovus Bank if the one month LIBOR rate increases above 3.0%.
Subsequent Event [Member] \| Raleigh, North Carolina [Member]
Subsequent Event [Line Items]
Acquisition of our property, area \| ft²		86,886
Percentage of space occupied		75.00%
Percentage of lease space to be retained by current tenant		18.00%
Percentage of building lease space to be occupied		93.00%
Lease commencement date		Aug. 01, 2015
Lease expiration date		Dec. 31, 2027
Annualized straight line rent escalations		$ 500
Number of options for renewal of lease \| Option		2
Renew the lease for additional periods		5 years
Amount to be paid for tenant improvements		$ 800
Lease commission to be paid		$ 400
Subsequent Event [Member] \| Atlanta, Georgia [Member]
Subsequent Event [Line Items]
Acquisition of our property, area \| ft²	78,151
Annualized straight line rent escalations	$ 1,300
Number of options for renewal of lease \| Option	2
Renew the lease for additional periods	5 years
Acquisition of our property, value	$ 13,000
Acquisition Expenses	100
Issuance of mortgage debt on property	$ 7,500
Average cap rate	9.90%
Subsequent Event [Member] \| Lease One [Member] \| Atlanta, Georgia [Member]
Subsequent Event [Line Items]
Acquisition of our property, area \| ft²	54,836
Lease expiration period	7 years
Subsequent Event [Member] \| Lease Two [Member] \| Atlanta, Georgia [Member]
Subsequent Event [Line Items]
Acquisition of our property, area \| ft²	23,315
Lease expiration period	15 years
Subsequent Event [Member] \| LIBOR [Member]
Subsequent Event [Line Items]
LIBOR Cap			3.00%
Subsequent Event [Member] \| Mortgage Notes Payable [Member]
Subsequent Event [Line Items]
Principal repayments on mortgage notes payable			$ 11,300
Debt instrument original maturity date			Sep. 01, 2015
Long-term notes payable			$ 1,700