Qualified Employee Benefit Plans - Amounts Included in Accumulated Other Comprehensive Loss (Details) - Retirement Plan - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net loss from experience different from that assumed and effects of changes and assumptions	$ 0	$ (22,899)
Prior service cost	0	(611)
Pension and other postretirement benefit plans, accumulated other comprehensive loss, before tax	0	(23,510)
Income tax benefit	0	147
Accumulated other comprehensive loss	$ 0	$ (23,363)