Benefit Plans - Defined Benefit Pension Plan (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Retirement Benefits [Abstract]
Service cost – benefits earned during year	$ 552	$ 630	$ 1,638	$ 1,869
Interest cost on projected benefit obligation	1,037	861	3,076	2,555
Expected return on plan assets	(2,917)	(2,825)	(8,655)	(8,382)
Amortization of prior service cost	(9)	(9)	(26)	(26)
Amortization of net loss	128	690	379	2,047
Net periodic pension income	$ (1,209)	$ (653)	$ (3,588)	$ (1,937)