Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 24, 2017	Sep. 30, 2018	Sep. 24, 2017
Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited)
Net (loss) income before attribution to noncontrolling interests	$ (12,594)	$ 22,669	$ 17,451	$ 77,550
Other comprehensive (loss) income, before tax:
Foreign currency translation adjustments	(154)	2,894	(3,466)	4,315
Interest rate swaps	1,960	641	11,512	(1,684)
Other comprehensive income, before tax	1,806	3,535	8,046	2,631
Income tax effect:
Foreign currency translation adjustments	35	(1,071)	780	(1,597)
Interest rate swaps	(477)	(237)	(2,649)	623
Income tax effect	(442)	(1,308)	(1,869)	(974)
Other comprehensive income, net of tax	1,364	2,227	6,177	1,657
Comprehensive (loss) income before attribution to noncontrolling interests	(11,230)	24,896	23,628	79,207
Less: comprehensive loss (income), redeemable noncontrolling interests	378	(352)	(26)	(1,891)
Less: comprehensive income, nonredeemable noncontrolling interests	(817)	(500)	(1,930)	(1,876)
Comprehensive (loss) income attributable to the Company	$ (11,669)	$ 24,044	$ 21,672	$ 75,440