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Derivative Financial Instruments (Details Textual) (Interest Rate Cap [Member], USD $)
1 Months Ended 12 Months Ended
Aug. 31, 2012
Dec. 31, 2012
Aug. 24, 2012
Agreement
Dec. 31, 2012
Interest Expense [Member]
Derivative Financial Instruments (Textual) [Abstract]        
Number of interest rate cap agreements     2  
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   19,000    
Change in fair value, reported in interest expense       $ 69,000