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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017	Dec. 29, 2017
Income Tax Disclosure [Abstract]
Unrecognized foreign earnings and profits					$ 147,500
Provisional income tax expense					14,700
Tax benefit from revaluation of net deferred tax liabilities					$ 56,500
Effective income tax rate	27.50%	2.60%
Income (loss) before provision for income taxes	$ 31,795	$ 9,814	$ 50,253	$ 13,551
Federal statutory tax rate			21.00%		35.00%
Unrecognized Tax Benefits	6,500		$ 6,500
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	1,100		1,100
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 6,200		$ 6,200

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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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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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