Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2017

Commitments And Contingencies Disclosure [Abstract]

Changes in Accrued Environmental Remediation and Related Costs

Changes in the accrued environmental remediation and related costs during the first nine months of 2017 are as follows:

	Amount
	(In thousands)
Balance at the beginning of the period	$	116,658
Additions charged to expense, net		3,236
Payments, net		(4,628	)
Balance at the end of the period	$	115,266
Amounts recognized in the Condensed Consolidated
Balance Sheet at the end of the period:
Current liability	$	11,400
Noncurrent liability		103,866
Balance at the end of the period	$	115,266