Postretirement Benefits - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Amounts included in accumulated other comprehensive loss
Net actuarial loss	$ 56,062	$ 26,752
Prior service cost	11,297	11,050
Net amount not yet recognized	$ 67,359	$ 37,802

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant