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

Quarterly report pursuant to Section 13 or 15(d)

Mortgage Notes Payable and Line of Credit (Details Textual)

Mortgage Notes Payable and Line of Credit (Details Textual) (USD $)	0 Months Ended	1 Months Ended	6 Months Ended					6 Months Ended			6 Months Ended				6 Months Ended	9 Months Ended		6 Months Ended			1 Months Ended
	Dec. 31, 2010	Sep. 30, 2012 Rate	Jun. 30, 2012 Mortagage_Note Rate Options Property	Jun. 30, 2011	Jan. 31, 2012	Dec. 31, 2011	Jun. 30, 2012 Deferred financing cost [Member]	Jun. 30, 2012 Senior secured revolving credit facility [Member]	Dec. 31, 2010 Senior secured revolving credit facility [Member]	Jun. 30, 2012 Letter of Credit [Member]	Jun. 30, 2012 Key Bank National Association [Member]	Jun. 30, 2012 City National Bank [Member]	Jun. 30, 2012 Modern Woodmen of America [Member]	Jun. 30, 2012 University of Phoenix Mortgage [Member]	Jun. 30, 2012 Mortgage Notes Payable One [Member] Options Rate	Sep. 30, 2011 Mortgage Notes Payable One [Member]	Dec. 31, 2011 Mortgage Notes Payable One [Member]	Jun. 30, 2012 Line of Credit [Member]	Jun. 30, 2012 Mortgage Notes Payable [Member] Mortagage_Note	Dec. 31, 2011 Mortgage Notes Payable [Member]	Feb. 29, 2012 Mortgage Notes Payables Twenty Three [Member]
Mortgage Notes Payable and Line of Credit (Additional Textual) [Abstract]
Number of annual extension options															1
Extended maturity date on mortgage loans															Oct. 01, 2013
Number of fixed-rate mortgage notes payable																			25
Number of properties collateralized in fixed-rate mortgage notes payable			66
Repaid mortgage			$ 4,317,000	$ 4,454,000																	$ 2,300,000
Original maturity date of mortgage																					2030-04
Amount of fees remitted on extension of outstanding principle balance							100,000
Weighted average interest rate on debt															4.76%
Fees to be remitted on current outstanding principal balance															0.25%
Fair value of fixed-rate mortgage notes payable outstanding														326,500,000
Line of Credit, maturity date								Dec. 28, 2013
Number of properties pledged as collateral under Line of Credit			7
Additional extension period interest rate description																based upon the one-year swap rate at the time of extension and a fixed spread of 4.41%
Period of swap rate for computation of variable interest rate																1 year
Contractual Fixed-Rate Mortgage Notes Payable			975,000												45,233,000		45,233,000		315,581,000	286,193,000
Carrying value of fixed-rate mortgage notes payable outstanding			314,769,000			285,350,000								314,800,000
Mortgage, original maturity date											May 01, 2022	Dec. 31, 2026	May 10, 2027		Oct. 01, 2012			Dec. 28, 2013
Line of Credit, outstanding	50,000,000								50,000,000
Letters of credit, outstanding										6,100,000
Long-term mortgages, number of annual extension options available															2
Mortgage Notes Payable and Line of Credit (Textual) [Abstract]
Weighted average interest rate on all debt outstanding			5.72%
Long-term mortgages, number of annual extension remaining			1
Number of long-term mortgages issued			5
Debt, in connection with exercise of option, interest rate, minimum		4.58%
Debt, in connection with exercise of option, interest rate, maximum		4.76%
Percentage of fees remitted on extension of outstanding principle balance			0.25%
Minimum aggregate debt service coverage ratio			1.2
Line of Credit, weighted average interest rate			2.80%
Standby letters of credit sublimit	20,000,000
Line of Credit, maximum borrowing capacity amended					75,000,000
Line of Credit, variable spread on interest rate	3.00%
Line of Credit, annual maintenance fees, percentage			0.25%
Line of Credit covenant limit of distributions to shareholders percentage					95.00%
Line of credit facility , maximum amount drawn			$ 22,100,000