Income Taxes Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of Year	$ 4,667	$ 5,604
Change in tax positions related to current year	290	0
Change in tax positions related to prior years	(198)
Change in tax positions related to prior years		99
Change in tax positions due to settlement with tax authorities	(1,949)	0
Expiration of the Statute of Limitations	(426)	(1,036)
Balance at end of year	$ 2,384	$ 4,667