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

Mortgage Notes Payable, Line of Credit and Term Loan Facility - Summary of Long-Term Mortgages (Detail)

Mortgage Notes Payable, Line of Credit and Term Loan Facility - Summary of Long-Term Mortgages (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Debt Instrument [Line Items]
Proceeds from Notes Payable	$ 37,905	$ 51,819
Principal Balance Repaid	$ 51,977	$ 23,625
Previous Weighted Average	4.47%
Mortgage Notes Payable [Member]
Debt Instrument [Line Items]
Date of Issuance	Apr. 28, 2016
Previous Weighted Average	4.77%
Mortgage Notes Payable [Member] \| First Niagara Bank [Member]
Debt Instrument [Line Items]
Date of Issuance	Mar. 01, 2016
Issuing Bank	First Niagara Bank
Proceeds from Notes Payable	$ 18,475
Libor rate description	LIBOR + 2.35%
Maturity Date	Mar. 01, 2023
Principal Balance Repaid	$ 21,197
Previous Weighted Average	6.14%
Mortgage Notes Payable [Member] \| Great Southern Bank [Member]
Debt Instrument [Line Items]
Date of Issuance	Apr. 22, 2016
Issuing Bank	Great Southern Bank
Proceeds from Notes Payable	$ 9,530
Libor rate description	LIBOR + 2.75%
Maturity Date	Apr. 22, 2019
Principal Balance Repaid	$ 3,667
Previous Weighted Average	6.25%
Mortgage Notes Payable [Member] \| Gladstone Commercial [Member]
Debt Instrument [Line Items]
Principal Balance Repaid	$ 23
Previous Weighted Average	6.34%
Mortgage Notes Payable [Member] \| Prudential [Member]
Debt Instrument [Line Items]
Date of Issuance	May 26, 2016
Issuing Bank	Prudential
Proceeds from Notes Payable	$ 9,900
Spread on LIBOR	4.684%
Maturity Date	Jun. 01, 2026
Maturity Date One [Member] \| First Niagara Bank [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Spread on LIBOR	2.35%
Maturity Date One [Member] \| Great Southern Bank [Member] \| LIBOR [Member]
Debt Instrument [Line Items]
Spread on LIBOR	2.75%