Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Consolidated Statements of Stockholders' Equity
Income attributable to noncontrolling interests	$ 6,272	$ 6,282	$ 4,382
Accumulated other comprehensive income (loss)	(5,887)	(1,836)	671
Unrealized foreign currency translation gains (losses)	(5,402)	(411)	933
Net unrealized gain (loss) on the interest rate swap agreements	$ (485)	$ (1,425)	$ (262)