Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Operating leases, rent expense	$ 10,100,000	$ 10,200,000	$ 9,700,000
Non-cancelable purchase commitments	35,900,000
Indemnification [Member]
Other Commitments [Line Items]
Accrual for indemnification provisions	0
ISRAEL
Other Commitments [Line Items]
Royalty expenses	$ 4,200,000	5,200,000	$ 4,100,000
Property Subject to Operating Lease [Member] | Maximum [Member]
Other Commitments [Line Items]
Lease Expiration Date	Jun. 29, 2028
Property Lease Guarantee [Member] | Performance Guarantee [Member]
Other Commitments [Line Items]
Guarantees, Fair Value Disclosure	$ 2,300,000	2,700,000
Foreign Line of Credit [Member] | Performance Guarantee [Member]
Other Commitments [Line Items]
Long-term Line of Credit		2,000,000
Indemnity issued to secure credit facility		$ 2,200,000
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0