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Stock-Based Compensation (Details) (USD $)
3 Months Ended 12 Months Ended 54 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2011
May 31, 2016
Jul. 11, 2011
Share-based Compensation Arrangement by Share-based Payment Award          
Stock-based Compensation $ 354,000 $ 902,000      
Restricted Stock Shares Authorized         900,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross     351,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 1,900,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 13.57 $ 13.57 $ 13.57    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]          
Unvested at beginning of year, Number of Restricted Stock Awards (in shares) 276,800 351,000      
Unvested at beginning of year, Weighted Average Grant Date Fair Value (in dollars) $ 13.57 $ 13.57   $ 13.57  
Share-based Compensation Arrangements by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0 0      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 0.00 $ 0.00      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 0 0      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 0.00 $ 0.00      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (2,400) 0      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value $ 13.57 $ 0.00      
Outstanding (unvested) at end of year, Number of Restricted Stock Awards (in shares) 274,400 351,000 351,000    
Outstanding (unvested) at end of year, Weighted Average Grant Date Fair Value (in dollars) $ 13.57 $ 13.57 $ 13.57    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (in years)     1 year 9 months 22 days 4 years 5 months 15 days  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights       .20