INCOME TAX - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Net valuation allowance increase	$ 91,700,000	$ 141,700,000
ICTC carryforwards	54,500,000
Uncertain tax positions	3,994,000	0	$ 0
Penalties and interest expense	0	$ 0	$ 0
Uncertain tax positions expected to change in next 12 months	0
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	417,300,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 92,900,000