Employee Benefit Plans - Composition of Pension Plan Assets by Fair Value Level (Detail) - Defined Benefit Pension Plans - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Total	$ 27,810	$ 34,126	$ 47,940
United States
Defined Benefit Plan Disclosure [Line Items]
Total	27,810	27,185
U.K.
Defined Benefit Plan Disclosure [Line Items]
Total		6,941
Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Total	7,786	8,591
Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Total	18,733	15,954
Cash and Other | United States
Defined Benefit Plan Disclosure [Line Items]
Total	1,291	2,640
Others | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total		6,941
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	489	3,850
Level 1 | Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Total		694
Level 1 | Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Total		149
Level 1 | Cash and Other | United States
Defined Benefit Plan Disclosure [Line Items]
Total	489	1,903
Level 1 | Others | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total		1,104
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	41	5,881
Level 3 | Cash and Other | United States
Defined Benefit Plan Disclosure [Line Items]
Total	41	44
Level 3 | Others | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total		5,837
Assets Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Total	27,280	24,395
Assets Measured at NAV | Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Total	7,786	7,897
Assets Measured at NAV | Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Total	18,733	15,805
Assets Measured at NAV | Cash and Other | United States
Defined Benefit Plan Disclosure [Line Items]
Total	$ 761	$ 693