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Commitments and contingencies (Tables)

9 Months Ended

Sep. 30, 2025

Commitments and contingencies.

Schedule of Changes in Accrued Environmental Remediation and Related Costs

Changes in the accrued environmental remediation and related costs during the first nine months of 2025 are as follows:

​	​	​	​
​	​	Amount
​		(In thousands)
​	​	​	​
Balance at the beginning of the period	​	$	69,278
Additions charged to expense, net	​		1,579
Payments, net	​		(57,722)
Balance at the end of the period	​	$	13,135
​	​	​	​
Amounts recognized in the Condensed Consolidated Balance Sheet at the end of the period:	​	​	​
Current liability	​	$	2,666
Noncurrent liability	​	​	10,469
Balance at the end of the period	​	$	13,135

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- References

No definition available.

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- Definition

Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.Y.Q1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.Y.Q2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480102/450-20-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481931/410-30-50-10

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481931/410-30-50-10

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Subparagraph (d)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481931/410-30-50-10

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