STOCK REPURCHASE PROGRAMS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2005	Dec. 31, 2017	Dec. 31, 2016	Nov. 03, 2011
Equity [Abstract]
Authorized amount of stock repurchase program				$ 15,000
Stock repurchased and retired during period, shares		67,974	17,300
Average cost per share of stock repurchased		$ 27.34	$ 22.14
Parent entity stock purchase program authorized amount	$ 15,000
Parent entity stock purchase program remaining authorized purchase amount		$ 4,500