INCOME TAXES - Unrecognized Tax Benefits (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Total unrecognized tax benefits beginning of period	$ 491
Tax positions taken during a prior period	0
Tax positions taken during the current period	0
Settlements with taxing authorities	0
Lapse of applicable statute of limitations	0
Total unrecognized tax benefits at end of period	$ 491