RETIREMENT PLANS - Additional Information (Details) - Foreign Pension Plan $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($) plan
Defined Benefit Plan Disclosure [Line Items]
Number of pension plans | plan	2
Weighted average of expected returns on asset investment, percentage	4.90%
Expected contributions for 2016 | $	$ 1.3
Total contributions to date | $	$ 0.9
Equities
Defined Benefit Plan Disclosure [Line Items]
Weighted average of expected returns on asset investment, percentage	6.20%
Bonds
Defined Benefit Plan Disclosure [Line Items]
Weighted average of expected returns on asset investment, percentage	2.20%
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Number of pension plans | plan	1
Norway
Defined Benefit Plan Disclosure [Line Items]
Subsidiary's percentage of total defined benefit plans	3.00%