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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive (Loss) Income [Member]
Retained Earnings [Member]
Beginning balance at Dec. 31, 2014 [1] $ 32,820 $ 71 $ 4,410 $ (23) $ 28,362
Beginning balance, shares at Dec. 31, 2014 [1]   7,126      
Common stock issued on exercise of options and vesting of restricted stock units 689 $ 1 688 0 0
Common stock issued on exercise of options and vesting of restricted stock units, shares   88      
Common stock repurchased on vesting of restricted stock units (465) $ 0 (465) 0 0
Common stock repurchased on vesting of restricted stock units, shares   (12)      
Share based compensation expense 1,727 $ 0 1,727 0 0
Excess tax benefits from share-based compensation 56 0 56 0 0
Cash dividends on common stock (4,726) 0 0 0 (4,726)
Unrealized gain on investments, net of tax 33 0 0 33 0
Net income 14,047 0 0 0 14,047
Ending balance at Sep. 30, 2015 [1] 44,181 $ 72 6,416 10 37,683
Ending balance, shares at Sep. 30, 2015 [1]   7,202      
Beginning balance at Dec. 31, 2015 54,551 $ 72 6,964 (31) 47,546
Beginning balance, shares at Dec. 31, 2015   7,203      
Common stock issued on exercise of options and vesting of restricted stock units 72 $ 0 72 0 0
Common stock issued on exercise of options and vesting of restricted stock units, shares   52      
Common stock repurchased on vesting of restricted stock units (433) $ 0 (433) 0 0
Common stock repurchased on vesting of restricted stock units, shares   (11)      
Share based compensation expense 1,881 $ 0 1,881 0 0
Excess tax benefits from share-based compensation 265 0 265 0 0
Cash dividends on common stock (4,766) 0 0 0 (4,766)
Unrealized gain on investments, net of tax 58 0 0 58 0
Net income 10,752 0 0 0 10,752
Ending balance at Sep. 30, 2016 $ 62,380 $ 72 $ 8,749 $ 27 $ 53,532
Ending balance, shares at Sep. 30, 2016   7,244      
[1] See restatement disclosure in 2015 Form 10-K