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Stock-Based Compensation Unvested Stock Option Awards (Details) (Unvested Stock Options [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Mar. 31, 2012
Y
Unvested Stock Options [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unvested (in shares) 2,983
Forfeited (in shares) (66)
Vested (in shares) (657)
Unvested (in shares) 2,260
Unvested, Weighted Average Grant Date Fair Value (usd per share) $ 2.06
Forfeited, Weighted Average Exercise Price (usd per share) $ 3.76
Vested, Weighted Average Exercise Price (usd per share) $ 2.25
Unvested, Weighted Average Grant Date Fair Value (usd per share) $ 1.95
Unvested, Aggregate Grant Date Fair Value $ 6,143
Forfeited, Aggregate Grant Date Fair Value (250)
Vested, Aggregate Grant Date Fair Value (1,477)
Unvested, Aggregate Grant Date Fair Value 4,416
Unearned compensation $ 2,697
Weighted Average Remaining Contractual Term, (in years) 3.98