Income taxes - Deferred tax assets and liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Tax loss and credit carryforwards	$ 168,113	$ 180,782
Lease Liabilities	32,127	25,429
Pension	350	12,237
Reserves and accruals	64,421	72,931
Other	4,379	7,996
Less: valuation allowances	(143,177)	(155,008)
Total deferred tax assets	126,213	144,367
Deferred tax liabilities:
Property, plant and equipment	24,479	25,633
Intangibles — stock acquisitions	352,139	476,150
Unremitted non-U.S. earnings	73,385	91,539
Lease Assets	32,127	25,429
Other	7,387	2,221
Total deferred tax liabilities	489,517	620,972
Net deferred tax liability	(363,304)	$ (476,605)
Current income tax expense	$ 73,200