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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Retained Earnings
Treasury Stock
Total
Balance at Dec. 31, 2012 $ 191 $ 34,364 $ 154,599 $ (48,306) $ 140,848
Balance (in shares) at Dec. 31, 2012 16,147,324        
Increase (Decrease) in Stockholders' Equity          
Exercise of stock options   (5,071)   8,509 3,438
Exercise of stock options (in shares) 335,444        
Excess tax benefit from stock-based compensation   413     413
Stock based compensation expense   1,220     1,220
Net income     17,961   17,961
Balance at Dec. 31, 2013 $ 191 30,926 172,560 (39,797) 163,880
Balance (in shares) at Dec. 31, 2013 16,482,768        
Increase (Decrease) in Stockholders' Equity          
Exercise of stock options   (9,553)   6,827 (2,726)
Exercise of stock options (in shares) 330,026        
Excess tax benefit from stock-based compensation   386     386
Stock based compensation expense   1,226     1,226
Net income     14,185   14,185
Balance at Dec. 31, 2014 $ 191 22,985 186,745 (32,970) $ 176,951
Balance (in shares) at Dec. 31, 2014 16,812,794       16,812,794
Increase (Decrease) in Stockholders' Equity          
Exercise of stock options   (2,666)   6,566 $ 3,900
Exercise of stock options (in shares) 389,905        
Excess tax benefit from stock-based compensation   865     865
Stock based compensation expense   1,544     1,544
Net income     20,659   20,659
Balance at Dec. 31, 2015 $ 191 $ 22,728 $ 207,404 $ (26,404) $ 203,919
Balance (in shares) at Dec. 31, 2015 17,202,699       17,202,699