INCOME TAXES - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Current tax provision:
Federal									$ 514	$ 1,051
State									121	258
Total current tax provision									635	1,309
Deferred tax benefit:
Federal									(170)	(293)
State									(48)	(85)
Total deferred tax (benefit) provision									(218)	(378)
Total tax provision	$ 181	$ 104	$ 92	$ 40	$ 302	$ 269	$ 211	$ 149	$ 417	$ 931