Income Taxes - Schedule of Analysis of Deferred Tax Assets and Deferred Tax Liabilities Showing Tax Effects of Significant Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets
Property and leasehold costs	$ 225,379	$ 240,065
Liabilities for dismantlements	36,719	34,258
Postretirement and other employee benefits	66,293	82,437
U. S. net operating loss	289,594	357,490
Investment in partnership	9,096	14,655
Other deferred tax assets	100,352	48,778
Total gross deferred tax assets	727,433	777,683
Less: Valuation allowance	(149,498)	(146,861)
Net deferred tax assets	577,935	630,822
Deferred tax liabilities
Deferred tax on undistributed foreign earnings	(5,000)	(5,000)
Accumulated depreciation, depletion and amortization	(811,178)	(847,981)
Other deferred tax liabilities	(97,547)	(54,052)
Total gross deferred tax liabilities	(913,725)	(907,033)
Net deferred tax (liabilities) assets	$ (335,790)	$ (276,211)