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RECENT ACCOUNTING PRONOUNCEMENTS (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) $ / shares | Sep. 30, 2016 USD ($) $ / shares | Sep. 30, 2017 USD ($) $ / shares | Sep. 30, 2016 USD ($) $ / shares
Accounting Changes and Error Corrections [Abstract] |  |  |  |
Net income | $ | $ 11,339 | $ 10,903 | $ 31,649 | $ 29,165
Basic earnings per share (in dollars per share) | $ 0.72 | $ 0.70 | $ 2.03 | $ 1.88
Diluted earnings per share (in dollars per share) | $ 0.72 | $ 0.70 | $ 2.02 | $ 1.88
Stock split conversion ratio |  | 1.5 | 1.5 |

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