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Stock-Based Compensation Performance Shares (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 2,618 $ 4,609 $ 448
Performance Shares Plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period (in years) 2 years    
Balance at (in shares) 1,177 2,767 1,188
Granted (in shares)     1,782
Vested (in shares)   (291)  
Forfeited (in shares) (1,177) (496) (203)
Shares not vesting due to Performance (in shares)   (803)  
Balance at (in shares) 0 1,177 2,767
Balance at, Weighted Average Grant Date Fair Value (usd per share) $ 4.26 $ 4.30 $ 4.47
Granted, Weighted Average Grant Date Fair Value (usd per share)     $ 4.19
Vested, Weighted Average Grant Date Fair Value (usd per share)   $ 4.47  
Forfeited, Weighted Average Grant Date Fair Value (usd per share) $ 4.26 $ 4.02 $ 4.36
Shares not vesting due to Performance, Weighted Average Grant Date Fair Value (usd per share)   $ 4.47  
Balance at, Weighted Average Grant Date Fair Value (usd per share) $ 0 $ 4.26 $ 4.30
Compensation expense   $ 163 $ (1,514)