Unaudited Condensed Consolidated Statement of Partners' Equity (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2016	Mar. 29, 2015
Total partners' equity	$ (41,806)	$ (21,192)
Foreign currency translation adjustment, tax	2,520	(4,147)
Unrealized loss on cash flow hedging derivatives, tax	$ 464	$ 477
Partnership distribution declared, amount per limited partnership unit	$ 0.825	$ 0.75
Special L.P. Interests [Member]
Total partners' equity	$ 5,290	$ 5,290