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Condensed Consolidated Statements Of Shareholders' Equity (USD $)
In Thousands, except Share data
Common Shares [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Treasury Shares [Member]
Total
Balances, value at Dec. 31, 2011 $ 5,779 $ 674,498 $ 449,193 $ (13,450) $ (272) $ 1,115,748
Balances, shares at Dec. 31, 2011 57,791,000         57,791,000
Stock-based compensation expense   1,276       1,276
Shares repurchased and retired, shares (256,000)          
Shares repurchased and retired, value (26) (2,745) (1,164)     (3,935)
Stock options exercised, shares 116,000         116,000
Stock options exercised, value 12 1,353       1,365
Issuance of restricted shares, net of forfeitures, shares 207,000          
Issuance of restricted shares, net of forfeitures, value 21 (21)        
Excess tax benefit of stock-based compensation   69       69
Comprehensive income     5,598 3,691   9,289
Balances, value at Mar. 31, 2012 $ 5,786 $ 674,430 $ 453,627 $ (9,759) $ (272) $ 1,123,812
Balances, shares at Mar. 31, 2012 57,858,000         57,858,000