Shareholders' Equity - Components of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ 327,631	$ 335,397	$ 296,608
Other comprehensive loss	6,753	(3,246)
Income taxes	(462)	642
Interest income (expense), net	(2,483)	(122)	(828)
Other expense, net	8,381	(8,143)	(6,381)
Income taxes	(2,885)	1,413	9,074
Ending Balance	356,864	327,631	335,397
Reclassification Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Interest income (expense), net		(1,034)
Other expense, net		(5,193)
Income taxes		1,559
ASU 2018-02 [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Cumulative effect adjustment from adoption of ASU 2018-02		937
Convertible Loan [Member] | Neo Medical SA [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Other comprehensive loss	1,881
Income taxes	(462)
Ending Balance	1,419
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(3,039)	(2,386)
Other comprehensive loss	4,872	(653)
Ending Balance	1,833	(3,039)	(2,386)
Debt Security [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		5,682
Other comprehensive loss		(2,593)
Income taxes		642
Ending Balance			5,682
Debt Security [Member] | Reclassification Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Interest income (expense), net		(1,034)
Other expense, net		(5,193)
Income taxes		1,559
Debt Security [Member] | ASU 2018-02 [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Cumulative effect adjustment from adoption of ASU 2018-02		937
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(3,039)	3,296	3,787
Ending Balance	$ 3,252	$ (3,039)	$ 3,296