Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2018	Jun. 25, 2017	Jul. 01, 2018	Jun. 25, 2017
Condensed Consolidated Statements of Comprehensive Income (Unaudited)
Net income before attribution to noncontrolling interests	$ 12,665	$ 24,982	$ 30,045	$ 54,881
Other comprehensive (loss) income, before tax:
Foreign currency translation adjustments	(5,295)	808	(3,312)	1,421
Interest rate swaps	2,834	(1,857)	9,552	(2,325)
Other comprehensive (loss) income, before tax	(2,461)	(1,049)	6,240	(904)
Income tax effect:
Foreign currency translation adjustments	1,218	(299)	745	(526)
Interest rate swaps	(627)	687	(2,172)	860
Income tax effect	591	388	(1,427)	334
Other comprehensive (loss) income, net of tax	(1,870)	(661)	4,813	(570)
Comprehensive income before attribution to noncontrolling interests	10,795	24,321	34,858	54,311
Less: comprehensive income, redeemable noncontrolling interests	(319)	(745)	(404)	(1,539)
Less: comprehensive income, nonredeemable noncontrolling interests	(555)	(699)	(1,113)	(1,376)
Comprehensive income attributable to the Company	$ 9,921	$ 22,877	$ 33,341	$ 51,396