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Consolidated Statement of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
BALANCE (in shares) at Dec. 31, 2017   25,515        
BALANCE at Dec. 31, 2017 $ 1,124,282 $ 255 $ 291,461 $ 1,246,323 $ (123,226) $ (290,531)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 35,814     35,814    
Other comprehensive income (loss), net of taxes 17,276       17,276  
Purchases of treasury stock (9,199)         (9,199)
Net issuance of treasury shares to employee stock compensation plans (in shares)   12        
Net issuance of treasury shares to employee stock compensation plans (1,638)   (10,846)     9,208
Stock-based compensation 5,629   5,629      
Dividends paid, net of estimated forfeitures relative to participating securities ($0.26) (5,482)     (5,482)    
BALANCE (in shares) at Mar. 31, 2018   25,527        
BALANCE at Mar. 31, 2018 1,178,079 $ 255 286,244 1,288,052 (105,950) (290,522)
BALANCE (in shares) at Dec. 31, 2018   25,494        
BALANCE at Dec. 31, 2018 1,095,694 $ 255 292,774 1,394,817 (137,772) (454,380)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 38,648     38,648    
Other comprehensive income (loss), net of taxes (977)       (977)  
Net issuance of treasury shares to employee stock compensation plans (in shares)   28        
Net issuance of treasury shares to employee stock compensation plans (830)   (11,726)     10,896
Stock-based compensation 6,067   6,067      
Dividends paid, net of estimated forfeitures relative to participating securities ($0.26) (4,828)     (4,828)    
BALANCE (in shares) at Mar. 31, 2019   25,522        
BALANCE at Mar. 31, 2019 $ 1,127,713 $ 255 $ 287,115 $ 1,422,576 $ (138,749) $ (443,484)