INCOME TAXES - Summary of the Reconciliation of Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 0	$ 2,258,000
Additions for tax positions of current year	0	0
Other additions (reductions)	0	(2,258,000)	$ (2,300,000)
Ending balance	$ 0	$ 0	$ 2,258,000