EMPLOYEE BENEFIT PLANS - Components of net periodic benefit cost (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
U.S. defined benefit pension plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 132
Interest cost	4,513
Expected return on plan assets	(5,913)
Amortization of net loss	0
Settlement (gain) loss recognized	(100)
Net periodic (benefit) cost	(1,368)
Non-U.S. defined benefit pension plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,200	869
Interest cost	3,721	437
Expected return on plan assets	(3,082)
Amortization of net loss	3
Settlement (gain) loss recognized	617
Net periodic (benefit) cost	3,459
U.S. postretirement benefit plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	877
Interest cost	1,610
Expected return on plan assets	(316)
Amortization of net loss	0
Settlement (gain) loss recognized	0
Net periodic (benefit) cost	$ 2,171