Employee benefit plans - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined contribution pension plans	$ 3,900	$ 3,700	$ 3,000
Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Long-term return on plan assets	7.00%
Plan asset target allocation	34.00%
Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Long-term return on plan assets	5.00%
Plan asset target allocation	59.00%
Funds | Assets Measured at NAV | United States
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan assets	90.00%
Multi-asset Strategies and CMRT | United States
Defined Benefit Plan Disclosure [Line Items]
Long-term return on plan assets	4.00%
UK Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Plan benefit obligation	$ 5,800
Fair value of plan assets	6,900
Plan assets recognized in the Consolidated Balance Sheet	1,100
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Plan benefit obligation	36,090	50,367	52,873
Fair value of plan assets	34,126	47,940	$ 50,260
Expected contributions to Defined Benefit Plans in Next Fiscal Year	1,200
Net underfunded status of defined benefit pension plans	$ 1,964	$ 2,427
Weighted-average rate determining the actuarial present value of benefit obligation	5.10%	2.30%
Long-term return on plan assets	3.30%	3.30%	4.20%
Defined Benefit Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Plan benefit obligation	$ 30,254	$ 40,254
Fair value of plan assets	27,185	36,471
Defined Benefit Pension Plans | Assets Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24,395	34,180
Defined Benefit Pension Plans | Equities | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,591	12,951
Defined Benefit Pension Plans | Equities | Assets Measured at NAV | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7,897	12,012
Defined Benefit Pension Plans | Fixed Income | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,954	21,299
Defined Benefit Pension Plans | Fixed Income | Assets Measured at NAV | United States
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 15,805	$ 21,299