RESTRUCTURING ACTIVITIES - Liabilities Recorded For The Restructuring Plan (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Restructuring Cost and Reserve [Roll Forward]
Beginning balance	$ 6,178
Recognized Restructuring Expense	0
Costs Paid or Otherwise Settled	(4,974)
Ending balance	1,204
Severance
Restructuring Cost and Reserve [Roll Forward]
Beginning balance	1,597
Recognized Restructuring Expense	0
Costs Paid or Otherwise Settled	(1,597)
Ending balance	0
Other cash restructuring expenses
Restructuring Cost and Reserve [Roll Forward]
Beginning balance	4,581
Recognized Restructuring Expense	0
Costs Paid or Otherwise Settled	(3,377)
Ending balance	$ 1,204