Benefit Plans - Defined Benefit Pension Plan (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Retirement Benefits [Abstract]
Service cost – benefits earned during year	$ 330	$ 350
Interest cost on projected benefit obligation	1,603	1,554
Expected return on plan assets	$ (2,599)	$ (2,750)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Employee Benefits	Employee Benefits
Amortization of prior service cost	$ (9)	$ (9)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Employee Benefits	Employee Benefits
Amortization of net loss	$ 21	$ 223
Net periodic pension income	$ (654)	$ (632)