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Consolidated Statement of Stockholders' Equity (Unaudited) (USD $)
In Thousands
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Accumulated Earnings
Balance at Dec. 31, 2010$ 127,501$ 458$ (782)$ 77,449$ (445)$ 50,821
Balance, shares at Dec. 31, 2010 45,81150   
Net income35,222    35,222
Unrealized loss on hedging derivative, net of taxes of $41(53)   (53) 
Common stock purchased for treasury(22,371) (22,371)   
Common stock purchased for treasury, Shares  1,557   
Exercise of stock options1,4771 1,476  
Exercise of stock options, Shares123123    
Excess tax benefits from share-based compensation99  99  
Share-based compensation4,797  4,797  
Share-based compensation, shares 4    
Balance at Sep. 30, 2011$ 146,672$ 459$ (23,153)$ 83,821$ (498)$ 86,043
Balance, shares at Sep. 30, 2011 45,9381,607