COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2016

Commitments And Contingencies Disclosure [Abstract]

Schedule of total rent expense related to operating leases

Rent expense related to operating leases, including rent expense incurred on our behalf and allocated to us, was as follows:

	Year ended December 31,
	2016		2015		2014
	(In thousands)
Rent expense	$	2,861	$	2,395	$	1,881

Future minimum lease payments due under noncancelable operating leases

Future minimum lease payments due under noncancelable operating leases at December 31, 2016, were as follows (in thousands):

2017	$	3,512
2018	3,178
2019	2,520
2020	442
2021	34
Thereafter	—
Total future minimum lease payments	$	9,686

Schedule of accrued environmental remediation

A rollforward of the aggregate accrued environmental remediation liabilities follows.

	Total
	(In thousands)
Accrued environmental remediation, January 1, 2015	$	30,000
Payments made by affiliates	(13,136		)
Payments made with proceeds from insurance policies	(25,000		)
Additional accruals	21,800
Accrued environmental remediation, December 31, 2015	13,664
Payments made, including those by affiliates	(4,211		)
Accrued environmental remediation, December 31, 2016	$	9,453