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SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of weighted average shares outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule Of Earnings Per Share, Basic and Diluted, By Common Class, Including Two Class Method [Line Items]      
Net income available for stockholders: $ 14,306 $ 8,914 $ 7,528
Less: Dividends paid      
Undistributed earnings (loss) $ 6,668 $ 2,812 $ 1,823
Basic shares outstanding:      
Basic shares outstanding (in shares) 36,955 36,937 36,820
Diluted shares outstanding:      
Basic shares outstanding (in shares) 36,955 36,937 36,820
Diluted shares outstanding (in shares) 37,147 37,228 37,144
Basic earnings per share:      
Basic earnings per share (in dollars per share) $ 0.39 $ 0.24 $ 0.20
Diluted earnings per share:      
Diluted earnings per share (in dollars per share) $ 0.39 $ 0.24 $ 0.20
Common Stock      
Less: Dividends paid      
Dividends paid $ (7,393) $ (5,911) $ (5,525)
Undistributed earnings (loss) $ 6,449 $ 2,720 $ 1,762
Basic shares outstanding:      
Basic shares outstanding (in shares) 35,703 35,691 35,556
Diluted shares outstanding:      
Basic shares outstanding (in shares) 35,703 35,691 35,556
Dilutive effect of options (in shares) 192 291 324
Diluted shares outstanding (in shares) 35,895 35,982 35,880
Basic earnings per share:      
Distributed earnings (in dollars per share) $ 0.21 $ 0.16 $ 0.15
Undistributed earnings (loss) (in dollars per share) 0.18 0.08 0.05
Basic earnings per share (in dollars per share) 0.39 0.24 0.20
Diluted earnings per share:      
Distributed earnings (in dollars per share) 0.21 0.16 0.15
Undistributed earnings (loss) (in dollars per share) 0.18 0.08 0.05
Diluted earnings per share (in dollars per share) $ 0.39 $ 0.24 $ 0.20
Restricted shares of common stock      
Less: Dividends paid      
Dividends paid $ (245) $ (191) $ (180)
Undistributed earnings (loss) $ 219 $ 92 $ 61
Basic shares outstanding:      
Basic shares outstanding (in shares) 1,252 1,246 1,264
Diluted shares outstanding:      
Basic shares outstanding (in shares) 1,252 1,246 1,264
Diluted shares outstanding (in shares) 1,252 1,246 1,264
Basic earnings per share:      
Distributed earnings (in dollars per share) $ 0.20 $ 0.15 $ 0.14
Undistributed earnings (loss) (in dollars per share) 0.17 0.08 0.05
Basic earnings per share (in dollars per share) $ 0.37 $ 0.23 $ 0.19