OTHER LONG-TERM LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2016

Other Liabilities Disclosure [Abstract]

Schedule of other long-term liabilities

Other long-term liabilities consisted of the following:

	December 31, 2016		December 31, 2015
Defined benefit pension plan liabilities	$	60,007	$	42,509
Post-retirement medical plan liabilities	22,740		17,729
Environmental liabilities	142,935		8,189
Other	429		1,397
Total other long-term liabilities	$	226,111	$	69,824