ACCRUED AND OTHER CURRENT LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2018

Accrued Liabilities and Other Liabilities [Abstract]

Schedule of accrued and other current liabilities

Accrued and other current liabilities consist of the following at the dates indicated (in thousands):

	December 31,
	2018		2017
Taxes - other than income	$	29,644	$	33,327
Accrued employee benefit liabilities	6,220		7,228
Accrued environmental remediation liabilities	11,658		9,242
Interest payable	58,360		57,164
Unearned revenue	31,593		34,734
Employee compensation related accruals	27,602		32,616
Accrued capital expenditures	59,128		48,690
ARO	—		1,255
Other	51,988		40,951
Total accrued and other current liabilities	$	276,193	$	265,207