Unaudited Condensed Consolidated Statements of Partners' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 25, 2016	Sep. 24, 2017	Sep. 25, 2016
Statement of Partners' Capital [Abstract]
Foreign currency translation adjustment, tax	$ (803)	$ 0	$ 3,131
Unrealized loss on cash flow hedging derivatives, tax		$ (1,113)	$ (279)
Partnership distribution declared, amount per limited partnership unit (in dollars per share)	$ 2.475	$ 2.565	$ 2.475