Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2021

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 three months of 2021 are as follows:

	Amount
	(In thousands)
Balance at the beginning of the period	$	93,416
Additions charged (credited) to expense, net		(90	)
Payments, net		(311	)
Balance at the end of the period	$	93,015
Amounts recognized in the Condensed Consolidated
Balance Sheet at the end of the period:
Current liability	$	2,167
Noncurrent liability		90,848
Balance at the end of the period	$	93,015