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Consolidated Statements of Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income
Balance at Dec. 31, 2009            
Increase (Decrease) in Stockholders' Equity            
Treasury stock (in shares)     (1,118,600)      
Balance at Dec. 31, 2010 $ 762,512 $ 409 $ (38,098) $ 656,969 $ 137,436 $ 5,796
Balance (in shares) at Dec. 31, 2010   40,337,950        
Increase (Decrease) in Stockholders' Equity            
Exercise of stock options 10,714 7   10,707    
Exercise of stock options (in shares)   688,105        
Equity-based compensation expense-continuing operations 12,807     12,807    
Equity-based compensation expense-discontinued operations 689     689    
Issuance, vesting and cancellation of restricted stock (3,174) 1   (3,175)    
Issuance, vesting and cancellation of restricted stock (in shares)   131,196        
Treasury stock (162,077)   (162,077)      
Treasury stock (in shares)   (4,160,228) (4,160,228)      
Debt Conversion (32) 18   (50)    
Debt Conversion (in shares)   1,771,413        
Excess tax benefits from stock option exercises 10,406     10,406    
Other comprehensive income (loss), net of tax 688       (106) 794
Net income (loss) 127,987       127,987  
Balance at Dec. 31, 2011 760,520 435 (200,175) 688,353 265,317 6,590
Balance (in shares) at Dec. 31, 2011   38,768,436        
Increase (Decrease) in Stockholders' Equity            
Exercise of stock options 5,409 4   5,405    
Exercise of stock options (in shares)   351,436        
Equity-based compensation expense-continuing operations 14,268     14,268    
Issuance, vesting and cancellation of restricted stock (1,725) 7   (1,732)    
Issuance, vesting and cancellation of restricted stock (in shares)   208,631        
Treasury stock   (53) 200,175   (200,122)  
Debt Conversion 310     310    
Excess tax benefits from stock option exercises 2,119     2,119    
Other comprehensive income (loss), net of tax (617)         (617)
Net income (loss) 30,928       30,928  
Balance at Dec. 31, 2012 811,212 393   708,723 96,123 5,973
Balance (in shares) at Dec. 31, 2012   39,328,503        
Increase (Decrease) in Stockholders' Equity            
Exercise of stock options 2,199 2   2,197    
Exercise of stock options (in shares)   149,170        
Equity-based compensation expense-continuing operations 13,130     13,130    
Issuance, vesting and cancellation of restricted stock (2,696) 2   (2,698)    
Issuance, vesting and cancellation of restricted stock (in shares)   188,522        
Other comprehensive income (loss), net of tax (1,352)         (1,352)
Net income (loss) (42,263)       (42,263)  
Balance at Dec. 31, 2013 $ 780,230 $ 397   $ 721,352 $ 53,860 $ 4,621
Balance (in shares) at Dec. 31, 2013   39,666,195