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Stock-Based Compensation Summarized Data for Stock Based Compensation Plans (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Stock--Based Compensation [Abstract]      
Compensation expense for all stock based compensation plans $ 4,520 $ 2,618 $ 4,609
Tax (expense) benefits for stock-based compensation 0 0 0
Intrinsic value of stock options exercised 0 0 22
Fair value of stock options vested $ 1,230 $ 1,477 $ 189