Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2017	Jun. 26, 2016	Jun. 25, 2017	Jun. 26, 2016
Consolidated Statements of Comprehensive Income (Unaudited)
Net income before attribution to noncontrolling interests	$ 24,982	$ 24,112	$ 54,881	$ 52,163
Other comprehensive income (loss), before tax:
Foreign currency income (loss) adjustments	808	(1,441)	1,421	(3,513)
Interest rate swaps	(1,857)	(2,760)	(2,325)	(6,049)
Other comprehensive loss, before tax	(1,049)	(4,201)	(904)	(9,562)
Income tax effect:
Foreign currency translation adjustments	(299)	533	(526)	1,300
Interest rate swaps	687	1,021	860	2,238
Income tax effect	388	1,554	334	3,538
Other comprehensive loss, net of tax	(661)	(2,647)	(570)	(6,024)
Comprehensive income before attribution to noncontrolling interests	24,321	21,465	54,311	46,139
Comprehensive loss, redeemable noncontrolling interests	(745)	(881)	(1,539)	(2,125)
Comprehensive loss, nonredeemable noncontrolling interests	(699)	(690)	(1,376)	(1,315)
Comprehensive income attributable to the Company	$ 22,877	$ 19,894	$ 51,396	$ 42,699