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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Effective tax rate	14.40%		18.50%		20.40%	17.60%
Accrued interest on unrecognized tax benefits	$ 581				$ 581		$ 568
Gross unrecognized tax benefits excluding interest and penalties	41,170				41,170		$ 32,684
Net unrecognized tax benefits excluding interest and penalties	$ 33,415				33,415
Net unrecognized tax benefits, excluding interest and penalties, related to foreign tax positions					1,225
Income Tax Reconciliation Nondeductible Expense Executive Compensation					$ 5,023
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		9.80%		7.50%	3.80%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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