RESTRUCTURING ACTIVITIES - Pre-tax Restructuring Expenses Recognized (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4,400
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,340
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2,060
Severance | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	423
Severance | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,978
Other cash restructuring expenses | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	772
Other cash restructuring expenses | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 82