OTHER LONG-TERM OBLIGATIONS AND DEFERRED CREDITS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Contingent consideration obligation	$ 27,500,000	$ 3,000,000
Deferred payment obligation	$ 5,300,000	$ 0
Minimum [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Contingent consideration, term	2 years
Long term incentive plan, term	1 year
Maximum [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Contingent consideration, term	6 years
Long term incentive plan, term	10 years