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Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 15,173	$ 10,297	$ 8,261
Increases related to tax positions taken in current year	60	266	1,291
Increases related to tax positions taken in prior years	1,207	7,246	5,508
Reductions related to tax positions taken in prior years	(10,560)	(1,268)	(840)
Reductions related to settlements with tax authorities	(2,215)	0	(1,700)
Reductions related to the expiration of statutes of limitations	0	(1,369)	(2,223)
Balance at end of year	$ 3,665	$ 15,173	$ 10,297

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Amount of unrecognized tax benefits.

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