Stockholders' equity - Schedule of Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	$ 362,470
Balance at end of period	382,150	$ 362,470
Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(171,235)	(169,575)	$ (172,843)
Other comprehensive income (loss)	(6,956)	(1,660)	3,268
Balance at end of period	(178,191)	(171,235)	(169,575)
Accumulated Defined Benefit Plans Adjustment | Defined Benefit Pension Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(68,468)	(80,704)	(78,257)
Other comprehensive income (loss)	3,592	4,813	4,330
Plan settlement	138
Net actuarial gain (loss) arising during year	20,881	7,423	(6,777)
Balance at end of period	(43,857)	(68,468)	(80,704)
Other | OPEB
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(1,053)	(910)	(590)
Other comprehensive income (loss)	(369)	(143)	(320)
Change in value of debt securities	(50)
Net actuarial gain (loss) arising during year	529
Balance at end of period	(943)	(1,053)	(910)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance at beginning of period	(240,756)	(251,189)	(251,690)
Other comprehensive income (loss)	17,765	10,433	501
Balance at end of period	$ (222,991)	$ (240,756)	$ (251,189)