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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Paid-in Capital
Retained Earnings
Balance (in shares) at Dec. 31, 2012   55,166    
Balance at Dec. 31, 2012 $ 138,136 $ 221 $ 0 $ 137,915
Net income 37,547     37,547
Stock options exercised and restricted stock awards granted, including tax benefits (in shares)   435    
Stock options exercised and restricted stock awards granted, including tax benefits 2,310 $ 2 2,308  
Share-based compensation 1,763   1,763  
Stock repurchased and retired (in shares)   (534)    
Stock repurchased and retired (8,222) $ (2) (4,071) (4,149)
Dividends (7,428)     (7,428)
Balance (in shares) at Dec. 31, 2013   55,067    
Balance at Dec. 31, 2013 164,106 $ 221 0 163,885
Net income 44,158     44,158
Stock options exercised and restricted stock awards granted, including tax benefits (in shares)   463    
Stock options exercised and restricted stock awards granted, including tax benefits 2,557 $ 1 2,556  
Share-based compensation 2,178   2,178  
Stock repurchased and retired (in shares)   (1,488)    
Stock repurchased and retired (29,284) $ (6) (4,734) (24,544)
Dividends (9,656)     (9,656)
Balance (in shares) at Dec. 31, 2014   54,042    
Balance at Dec. 31, 2014 174,059 $ 216 0 173,843
Net income 45,728     45,728
Stock options exercised and restricted stock awards granted, including tax benefits (in shares)   546    
Stock options exercised and restricted stock awards granted, including tax benefits 5,240 $ 2 5,238  
Share-based compensation 2,891   2,891  
Stock repurchased and retired (in shares)   (1,576)    
Stock repurchased and retired (37,143) $ (6) (8,129) (29,008)
Dividends (11,857)     (11,857)
Balance (in shares) at Dec. 31, 2015   53,012    
Balance at Dec. 31, 2015 $ 178,918 $ 212 $ 0 $ 178,706