Pension and Other Postretirement Benefit Plans - Schedule of Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 515,407	$ 511,472
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30	103
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash/Accrued Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30	103
Cash/Accrued Income | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	30	103
Cash/Accrued Income | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash/Accrued Income | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mercer Common Collective Trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	515,377	511,369
Mercer Common Collective Trusts | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mercer Common Collective Trusts | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Mercer Common Collective Trusts | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 0	$ 0