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Derivative Financial Instruments (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2013
Derivative Financial Instruments (Textual) [Abstract]  
Number of interest rate cap agreements 2
Interest Rate Cap [Member]
 
Derivative Financial Instruments (Textual) [Abstract]  
Aggregate notional amount of interest rate cap agreements $ 57,500,000
Interest rate cap LIBOR and cap LIBOR at 1%
Derivative Cap Interest Rate 1.00%
Termination date of both interest rate cap agreements Sep. 30, 2014
Fair value of the interest rate caps reported in other assets 21,000
Interest Rate Cap [Member] | Interest Expense [Member]
 
Derivative Financial Instruments (Textual) [Abstract]  
Change in fair value, reported in interest expense $ 2,000