Annual report pursuant to Section 13 and 15(d)

EARNINGS PER COMMON SHARE (Details)

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EARNINGS PER COMMON SHARE (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of numerators and denominators of basic and diluted earnings per common share [Abstract]                    
Net income $ 8,172 $ 8,158 $ 8,003 $ 7,646 $ 7,043 $ 6,852 $ 6,728 $ 5,755 $ 31,979 $ 26,379
Weighted average shares outstanding, including participating stock awards - Basic (in shares)                 34,056,200 34,018,259
Dilutive potential common shares [Abstract]                    
Stock options (in shares)                 0 295
Weighted average shares outstanding - Diluted (in shares)                 34,056,200 34,018,554
Basic earnings per common share (in dollars per share) $ 0.24 $ 0.24 $ 0.24 $ 0.22 $ 0.21 $ 0.20 $ 0.20 $ 0.17 $ 0.94 $ 0.78
Diluted earnings per common share (in dollars per share) $ 0.24 $ 0.24 $ 0.24 $ 0.22 $ 0.21 $ 0.20 $ 0.20 $ 0.17 $ 0.94 $ 0.78