Stockholders' equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 382,150
Balance at end of period	369,812	$ 382,150
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(178,191)	(171,235)	$ (169,575)
Other comprehensive loss	1,072	(6,956)	(1,660)
Balance at end of period	(177,119)	(178,191)	(171,235)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(43,857)	(68,468)	(80,704)
Other comprehensive loss	1,436	3,592	4,813
Net actuarial gain (loss) arising during year	(3,094)	20,881	7,423
Plan settlement	4,142	138
Balance at end of period	(41,373)	(43,857)	(68,468)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(50)
Other comprehensive loss	35	(50)	0
Balance at end of period	(15)	(50)
Other | OPEB
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(893)	(1,053)	(910)
Other comprehensive loss	(357)	(369)	(143)
Net actuarial gain (loss) arising during year	136	529
Balance at end of period	(1,114)	(893)	(1,053)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(222,991)	(240,756)	(251,189)
Other comprehensive loss	3,370	17,765	10,433
Balance at end of period	$ (219,621)	$ (222,991)	$ (240,756)