RESTRUCTURING CHARGES - Restructuring Reserve (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Charges to income	$ 6,127
Payments	(1,792)
Other	(24)
Accrued liabilities
Restructuring Cost and Reserve [Line Items]
Liability balance		0
Liability balance	4,311	0
Employee severance and related costs
Restructuring Cost and Reserve [Line Items]
Charges to income	3,965
Payments	(1,057)
Other	(24)
Employee severance and related costs | Accrued liabilities
Restructuring Cost and Reserve [Line Items]
Liability balance		0
Liability balance	2,884	0
Other costs
Restructuring Cost and Reserve [Line Items]
Charges to income	2,162
Payments	(735)
Other	0
Other costs | Accrued liabilities
Restructuring Cost and Reserve [Line Items]
Liability balance		0
Liability balance	$ 1,427	$ 0