Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 25, 2016	Dec. 27, 2015
Consolidated Statements of Comprehensive Income
Net income before attribution to noncontrolling interests	$ 106,525	$ 109,092	$ 81,964
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	4,570	(7,922)	(2,133)
Interest rate swaps	1,421	1,492	(1,846)
Other comprehensive income (loss), before tax	5,991	(6,430)	(3,979)
Income tax effect:
Foreign currency translation adjustments	(1,691)	2,931	789
Interest rate swaps	(530)	(552)	683
Income tax effect	(2,221)	2,379	1,472
Other comprehensive income (loss), net of tax	3,770	(4,051)	(2,507)
Comprehensive income before attribution to noncontrolling interests	110,295	105,041	79,457
Less: comprehensive income, redeemable noncontrolling interests	(2,195)	(3,665)	(3,873)
Less: comprehensive income, nonredeemable noncontrolling interests	(2,038)	(2,607)	(2,409)
Comprehensive income attributable to the Company	$ 106,062	$ 98,769	$ 73,175