Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Federal income tax rate	21.00%	35.00%	35.00%
Tax cuts and jobs act of 2017, change in tax rate, income tax expense (benefit)		$ 18,100,000
Income tax benefit related to repatriation provision		500,000
Increase in income taxes	$ 2,500,000
Tax cuts and jobs act of 2017, change in tax rate, deferred income tax expense		39,000,000
Tax cuts and jobs act of 2017, reversal of valuation allowance		6,800,000
Tax cuts and jobs act of 2017, change in tax rate, deferred income tax benefit		18,100,000
Valuation allowance	30,029,000	7,405,000
Research and development, tax credit	(100,000)	3,900,000	$ 0
Unremitted earnings of subsidiaries outside the United States, reinvested	29,000,000	0
Deferred tax liability	0
Gross unrecognized tax benefits	29,600,000	26,900,000	$ 14,200,000	$ 12,200,000
Unrecognized tax benefits that would impact effective tax rate	$ 19,800,000
Maximum [Member]
Income Tax Contingency [Line Items]
Percentage of deduction in GILTI Income	50.00%
Gross unrecognized tax benefits balance may decrease within the next twelve months	$ 6,500,000
Minimum [Member]
Income Tax Contingency [Line Items]
Gross unrecognized tax benefits balance may decrease within the next twelve months	0
United States - Federal [Member]
Income Tax Contingency [Line Items]
Tax Cuts and Jobs Act of 2017, incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense		41,800,000
Net operating loss carryforwards	$ 37,600,000
Net operating loss carryforwards expiration year	2037
Tax credit carryforwards	$ 11,200,000
Tax credit carryforwards expiration year	2036
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Tax Cuts and Jobs Act of 2017, incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense		3,800,000
Net operating loss carryforwards	$ 2,700,000
Net operating loss carryforwards expiration year	2023
Tax credit carryforwards	$ 2,400,000
Tax credit carryforwards expiration year	2027
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Tax Cuts and Jobs Act of 2017, incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense		$ 300,000
Net operating loss carryforwards	$ 201,700,000
Tax credit carryforwards	$ 200,000
Tax credit carryforwards expiration year	2019
State and Local Jurisdiction [Member] | Maximum [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards expiration year	2038
State and Local Jurisdiction [Member] | Minimum [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards expiration year	2019