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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of year	$ 12,088	$ 10,561	$ 9,271
Additions based upon tax positions related to the current year	300	3,833	1,450
Reductions as a result of a lapse of applicable statute of limitations	0	(510)	0
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Revaluation Of Unrecognized Tax Benefit	0	1,782	0
Reductions related to prior period tax returns	(75)	(14)	(240)
Reductions relating to business combinations	0	0	(400)
Reductions relating to settlements with tax authorities	(98)	0	0
Unrecognized Tax Benefits, Decrease Relating to Divestiture	(6,846)	0	0
Balance, end of year	$ 5,369	$ 12,088	$ 10,561

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Revaluation Of Unrecognized Tax Benefit

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Amount of unrecognized tax benefits.

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