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Schedule of Change in Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Uncertainties [Abstract]
Unrecognized income tax benefits at January 1, 2020	$ 1,563
Increase related to positions taken in prior period	2,580
Increase related to positions taken in current period	283
Decrease related to expiration of statute of limitations	(133)
Unrecognized income tax benefits at December 31, 2020	4,293
Accrued interest	295	$ 200
Unrecognized income tax benefits recorded in other long-term liabilities at December 31, 2020	$ 4,588

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Amount recognized for uncertainty in income taxes classified as noncurrent.

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Amount of unrecognized tax benefits.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of interest expense accrued for an underpayment of income taxes.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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