Employee Benefit Plans - Composition of Pension Plan Assets by Fair Value Level (Detail) - Defined Benefit Pension Plans - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Total	$ 47,940	$ 50,260	$ 46,313
United States
Defined Benefit Plan Disclosure [Line Items]
Total	36,471	37,260
U.K.
Defined Benefit Plan Disclosure [Line Items]
Total	11,469	13,000
Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Total	12,951	14,636
Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Total	21,299	18,747
Cash and Other | United States
Defined Benefit Plan Disclosure [Line Items]
Total	2,221	3,877
Others | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total	11,469	13,000
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total	3,507	36,957
Level 1 | Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Total	831	2,158
Level 1 | Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Total		18,747
Level 1 | Cash and Other | United States
Defined Benefit Plan Disclosure [Line Items]
Total	1,352	3,052
Level 1 | Others | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total	1,324	13,000
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total	10,253	538
Level 3 | Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Total	108	538
Level 3 | Others | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total	10,145
Assets Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Total	34,180	12,765
Assets Measured at NAV | Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Total	12,012	11,940
Assets Measured at NAV | Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Total	21,299
Assets Measured at NAV | Cash and Other | United States
Defined Benefit Plan Disclosure [Line Items]
Total	$ 869	$ 825