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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
In Thousands, unless otherwise specified
Total
Common Stock
Additional Paid-In Capital
Treasury Stock
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2009 $ 272,776 $ 911 $ 1,235,669 $ (1,931,102) $ 1,033,039 $ (65,741)
Balance (in shares) at Dec. 31, 2009   91,121        
Increase (Decrease) in Stockholders' Equity            
Net income 193,737       193,737  
Effects of adoption of ASC 860 and ASC 810 (355,177)       (411,058) 55,881
Other comprehensive (loss) income (24,640)         (24,640)
Stock-based compensation 50,094   50,094      
Repurchases of common stock (148,717)     (148,717)    
Other common stock issued, including income tax benefits 35,021 17 35,004      
Other common stock issued, including income tax benefits (in shares)   1,676        
Balance at Dec. 31, 2010 23,094 928 1,320,767 (2,079,819) 815,718 (34,500)
Balance (in shares) at Dec. 31, 2010   92,797        
Increase (Decrease) in Stockholders' Equity            
Net income 315,286       315,286  
Other comprehensive (loss) income 11,444         11,444
Stock-based compensation 43,486   43,486      
Repurchases of common stock (240,877)     (240,877)    
Other common stock issued, including income tax benefits 23,533 13 23,520      
Other common stock issued, including income tax benefits (in shares)   1,344        
Balance at Dec. 31, 2011 175,966 941 1,387,773 (2,320,696) 1,131,004 (23,056)
Balance (in shares) at Dec. 31, 2011   94,141        
Increase (Decrease) in Stockholders' Equity            
Net income 422,256       422,256  
Other comprehensive (loss) income 1,195         1,195
Stock-based compensation 50,497   50,497      
Repurchases of common stock (137,396)     (137,396)    
Other common stock issued, including income tax benefits 15,969 9 15,960      
Other common stock issued, including income tax benefits (in shares)   822        
Balance at Dec. 31, 2012 $ 528,487 $ 950 $ 1,454,230 $ (2,458,092) $ 1,553,260 $ (21,861)
Balance (in shares) at Dec. 31, 2012   94,963