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Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Mar. 31, 2012
Mar. 31, 2011
Stockholders' Equity:    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 5,000 5,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 250,000 250,000
Common stock, shares issued 50,466 50,276
Treasury stock, shares 181 160