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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Examination [Line Items]
Effective tax rates	19.40%	15.00%	19.60%	6.50%
Discrete tax benefit recorded	$ (11,604)	$ (10,368)	$ (18,964)	$ (7,582)
Change in Accounting Method Accounted for as Change in Estimate [Member]
Income Tax Examination [Line Items]
Discrete tax benefit recorded				$ 10,500

X

- Definition

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

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

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