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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2019
Income Taxes [Line Items]
Income tax benefit	$ (226)	$ (698)
Effective income tax rate	1.70%	28.70%
Settlement of U.S. Competent Authority Claim [Member]
Income Taxes [Line Items]
Discrete tax expense	$ 600
Scenario, Forecast [Member]
Income Taxes [Line Items]
Effective income tax rate			5.00%

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Income Taxes [Line Items]

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

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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