Schedule of Market Values of Pension Plan Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 96,627	$ 127,360	$ 131,685
Equity Securities U.S. Large Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,301	7,306
Equity Securities U.S. Mid Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,451	2,014
Equity Securities U.S. Small Cap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,452	1,913
Equity Securities International Developed
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,867	5,062
Equity Securities Emerging Markets
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,426	3,152
Fixed Income Securities Core Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	17,074	22,904
Fixed Income Securities Long Duration Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	64,277	84,277
Cash Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 779	$ 732