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Basis of Presentation (Details 2) (Interest rate swaps, USD $)
In Thousands, unless otherwise specified
3 Months Ended 5 Months Ended
Mar. 31, 2013
Mar. 31, 2013
Dec. 31, 2012
Interest rate swaps
     
Interest Rate Caps      
Variable rate basis LIBOR    
Fixed rate (as a percent) 0.7525% 0.7525%  
Aggregate starting notional amount $ 150,000 $ 150,000  
Ineffective portion of cash flow recognized   0  
Fair value $ 538 $ 538 $ 794