v3.26.1
Benefit Plans - Defined Benefit Pension Plan (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Retirement Benefits [Abstract]        
Service cost – benefits earned during year $ 230 $ 267 $ 458 $ 531
Interest cost on projected benefit obligation 750 766 1,491 1,524
Expected return on plan assets $ (1,682) $ (1,603) $ (3,345) $ (3,188)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Employee Benefits Employee Benefits Employee Benefits Employee Benefits
Amortization of prior service cost $ (8) $ (8) $ (17) $ (17)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Employee Benefits Employee Benefits Employee Benefits Employee Benefits
Amortization of net (gain) loss $ (163) $ (48) $ (324) $ (96)
Net periodic pension income $ (873) $ (626) $ (1,737) $ (1,246)