Stockholders' equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 369,812
Balance at end of period	368,126
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(177,119)	$ (178,191)
Other comprehensive income/loss	(4,966)	(1,666)
Balance at end of period	(182,085)	(179,857)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(41,373)	(43,857)
Other comprehensive income/loss	379	393
Balance at end of period	(40,994)	(43,464)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(15)	(50)
Other comprehensive income/loss	15	(44)
Balance at end of period	0	(94)
Other | OPEB
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(1,114)	(893)
Other comprehensive income/loss	(47)	(60)
Balance at end of period	(1,161)	(953)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(219,621)	(222,991)
Other comprehensive income/loss	(4,619)	(1,377)
Balance at end of period	$ (224,240)	$ (224,368)