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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
In Thousands
Total
Common Stock
Class A
Common Stock
Class B
Additional Paid-in Capital
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Retained Earnings
Beginning Balance at Dec. 31, 2010 $ 149,172 $ 14 $ 3 $ 455,374 $ (475,184) $ (1,455) $ 170,420
Beginning Balance (in shares) at Dec. 31, 2010   14,351 2,694   (6,405)    
Net income 17,940 0 0 0 0 0 17,940
Other comprehensive income (loss) (597) 0 0 0 0 (597) 0
Conversion of class B to class A common stock 0 1 (1) 0 0 0 0
Conversion of class B to class A common stock (in shares)   316 (316)   0    
Issuance of class A common stock under stock option plans 2,463 0 0 2,463 0 0 0
Issuance of class A common stock under stock option plans (in shares)   143 0   0    
Ending Balance at Dec. 31, 2011 168,978 15 2 457,837 (475,184) (2,052) 188,360
Ending Balance (in shares) at Dec. 31, 2011   14,810 2,378   (6,405)    
Net income 20,546 0 0 0 0 0 20,546
Other comprehensive income (loss) 537 0 0 0 0 537 0
Conversion of class B to class A common stock 0 0 0 0 0 0 0
Conversion of class B to class A common stock (in shares)   151 (151)   0    
Issuance of class A common stock under stock option plans 10,250 0 0 10,250 0 0 0
Issuance of class A common stock under stock option plans (in shares)   501 0   0    
Ending Balance at Dec. 31, 2012 200,311 15 2 468,087 (475,184) (1,515) 208,906
Ending Balance (in shares) at Dec. 31, 2012   15,462 2,227   (6,405)    
Net income 83,332 0 0 0 0 0 83,332
Other comprehensive income (loss) 684 0 0 0 0 684 0
Issuance of class A common stock under stock option plans 341 0 0 341 0 0 0
Issuance of class A common stock under stock option plans (in shares)   16 0   0    
Tax effect of stock option exercises 23,580 0 0 23,580 0 0 0
Share-based compensation expense 2,078 0 0 2,078 0 0 0
Ending Balance at Dec. 31, 2013 $ 310,326 $ 15 $ 2 $ 494,086 $ (475,184) $ (831) $ 292,238
Ending Balance (in shares) at Dec. 31, 2013   15,478 2,227   (6,405)