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Stock Based Compensation - Schedule Of Restricted Stock And RSUs (Details) (Non-Vested Restricted Stock And Restricted Stock Unit Awards(RSUs) [Member], USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Non-Vested Restricted Stock And Restricted Stock Unit Awards(RSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Nonvested restricted stock and RSUs beginning balance, Shares 122,682  
Nonvested restricted stock and RSUs beginning balance, Weighted Average Grant Date Fair Value $ 31.06  
Granted, Shares 46,422  
Weighted Average Grant Date Fair Value, Granted $ 16.79  
Vested, Shares (16,381)  
Weighted Average Grant Date Fair Value, Vested $ 36.97  
Forfeited, Shares (1,138)  
Weighted Average Grant Date Fair Value, Forfeited $ 22.87  
Nonvested restricted stock and RSUs ending balance, Shares 151,585  
Nonvested restricted stock and RSUs ending balance, Weighted Average Grant Date Fair Value $ 26.11  
Nonvested restricted stock and RSUs ending balance, Aggregate Intrinsic Value $ 2,632 $ 1,908
Total restricted stock and RSU's ending balance, Shares 202,393  
Total restricted stock and RSUs ending balance, Weighted Average Grant Date Fair Value $ 29.13  
Total restricted stock and RSUs at September 30, 2012, Aggregate Intrinsic Value $ 3,514