Accumulated other comprehensive loss - Components of Changes in Accumulated Other Comprehensive Loss (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 336,860
Ending Balance	664,159
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(2,482)
Other comprehensive income (loss)	493
Ending Balance	(1,989)
Neo Medical [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	1,005
Other comprehensive income (loss)	(137)
Ending Balance	868
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,376)
Other comprehensive income (loss)	430
Ending Balance	(946)
Other Investments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	101
Other comprehensive income (loss)	74
Ending Balance	$ 175