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Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $)
In Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Beginning Balance at Dec. 31, 2009$ 450,674$ 418$ 166,514$ 280,399$ 7,819$ (4,476)
Beginning Balance, Shares at Dec. 31, 2009 41,817    
Issuance of common stock34 34   
Issuance of common stock, Shares 2    
Stock-based compensation expense3,652 3,652   
Excess tax benefit (provision) from stock-based compensation360 360   
Issuance of common stock and restricted stock under equity award plans(1,282)2(1,107)  (177)
Issuance of common stock and restricted stock under equity award plans, Shares 204    
Repurchase of common stock(5,212)    (5,212)
Retirement of treasury stock (6)(4,462)(4,450) 8,918
Retirement of treasury stock, Shares (558)    
Issuance of common stock for business acquisition136,67357136,616   
Issuance of common stock for business acquisition, Shares 5,601    
Comprehensive income (loss)8,228  6,6791,549 
Ending Balance at Sep. 30, 2010593,127471301,607282,6289,368(947)
Ending Balance, Shares at Sep. 30, 2010 47,066    
Issuance of common stock3 3   
Stock-based compensation expense1,283 1,283   
Excess tax benefit (provision) from stock-based compensation(6) (6)   
Issuance of common stock and restricted stock under equity award plans  24  (24)
Comprehensive income (loss)(11,212)  (16,952)5,740 
Ending Balance at Dec. 31, 2010583,195471302,911265,67615,108(971)
Beginning Balance, Shares at Dec. 31, 2010 47,066    
Issuance of common stock191 191   
Stock-based compensation expense3,411 3,411   
Excess tax benefit (provision) from stock-based compensation(52) (52)   
Issuance of common stock and restricted stock under equity award plans(1,190)3(992)  (201)
Issuance of common stock and restricted stock under equity award plans, Shares 312    
Repurchase of common stock(42,677)    (42,677)
Retirement of treasury stock (28)(22,359)(20,290) 42,677
Retirement of treasury stock, Shares (2,798)    
Comprehensive income (loss)32,705  43,264(10,559) 
Ending Balance at Sep. 30, 2011$ 575,583$ 446$ 283,110$ 288,650$ 4,549$ (1,172)
Ending Balance, Shares at Sep. 30, 2011 44,580