XML 157 R141.htm IDEA: XBRL DOCUMENT v3.25.0.1
Retirement Benefit Plans - Summary of Components of Accumulated Other Comprehensive Loss Related to Pensions and Postretirement Benefits (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Pension    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) $ 34,440 $ 41,296
Deferred tax (benefit) expense (6,488) (11,201)
Net amount recorded in (AOCL) 27,952 30,095
SERP    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) (44) 312
Deferred tax (benefit) expense 8 (85)
Net amount recorded in (AOCL) (36) 227
OPEB    
Defined Benefit Plan Disclosure [Line Items]    
Net actuarial loss (gain) (1,788) (3,231)
Deferred tax (benefit) expense 337 876
Net amount recorded in (AOCL) $ (1,451) $ (2,355)