Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Sep. 30, 2012
Mar. 31, 2012
Condensed Consolidated Balance Sheets    
Property and equipment, accumulated depreciation (in dollars) $ 773,184 $ 761,522
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, authorized shares 10,000 10,000
Preferred stock, issued shares 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized shares 175,000 175,000
Common stock, issued shares 46,508 46,508
Treasury stock, shares 1,600 1,839