TAXES - Income Tax Provision (Benefit) Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income tax provision (benefit)
Federal	$ 9,933	$ 12,834	$ 11,968
State	417	477	359
Current tax provision	10,350	13,311	12,327
Federal	3,738	99	(1,117)
State	73	(52)	7
Deferred tax provision (benefit)	3,811	47	(1,110)
Total tax provision	$ 14,161	$ 13,358	$ 11,217