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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - 3 months ended Mar. 31, 2018 - USD ($)
$ in Thousands
Total
Common Stock
Treasury Stock
Additional Paid-in Capital
Retained Earnings
Beginning balance at Dec. 31, 2017 $ 190,022 $ 40 $ (666) $ 159,059 $ 31,589
Beginning balance (in shares) at Dec. 31, 2017   40,393,033 81,052    
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Vesting of restricted stock (in shares)   96,713      
Stock-based compensation 610     610  
Employee stock purchase plan compensation 70     70  
Employee stock purchase plan compensation (in shares)   9,639      
Restricted stock buy back (54)   $ (54)    
Restricted stock buy back (in shares)   (8,822) 8,822    
Net income 975       975
Ending balance at Mar. 31, 2018 $ 191,623 $ 40 $ (720) $ 159,739 $ 32,564
Ending balance (in shares) at Mar. 31, 2018   40,490,563 89,874