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