Description of the Business and Basis of Presentation Adoption of New Accounting Procurements 2016-18 (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2018	Jun. 25, 2017
New Accounting Pronouncement, Early Adoption [Line Items]
Decrease in restricted cash		$ 0
Increase in restricted cash		0
Net cash used in investing activities	$ (81,944)	(33,601)
Net decrease in cash, cash equivalents and restricted cash	(43,328)	(32,712)
Cash, cash equivalents and restricted cash as of the beginning of the period	129,543	136,186
Cash, cash equivalents and restricted cash as of the end of the period	$ 86,215	103,474
Adjustments for new accounting principle, early adoption [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Decrease in restricted cash		(14,969)
Increase in restricted cash		5,957
Net cash used in investing activities		(9,012)
Net decrease in cash, cash equivalents and restricted cash		(9,010)
Cash, cash equivalents and restricted cash as of the beginning of the period		9,010
Cash, cash equivalents and restricted cash as of the end of the period		0
Previously reported [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Decrease in restricted cash		14,969
Increase in restricted cash		(5,957)
Net cash used in investing activities		(24,589)
Net decrease in cash, cash equivalents and restricted cash		(23,702)
Cash, cash equivalents and restricted cash as of the beginning of the period		127,176
Cash, cash equivalents and restricted cash as of the end of the period		$ 103,474