Income Taxes - Reconciliation and Tax Act (Details) - USD ($)		3 Months Ended	12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Income Tax Expense
Tax at U.S. federal statutory rate			$ 1,237,000	$ 49,120,000	$ 55,583,000
State and local income taxes			150,000	2,432,000	2,972,000
Foreign income taxes			4,879,000	5,306,000	3,143,000
Income of consolidated partnerships attributable to noncontrolling interests			(371,000)	(1,554,000)	(2,312,000)
Non-qualified deferred compensation plan (income) loss			483,000	(1,236,000)	(428,000)
Excess tax benefits on equity awards			447,000	(1,879,000)
Remeasurement of deferred taxes		$ (7,000,000)		(7,020,000)
Tax credits			(6,945,000)	(6,909,000)	(6,771,000)
Disposition of China			4,118,000
Other			(1,352,000)	(4,443,000)	(2,470,000)
Total income taxes			$ 2,646,000	$ 33,817,000	$ 49,717,000
Income Tax Rate
Tax at U.S. federal statutory rate (as a percent)	21.00%		21.00%	35.00%	35.00%
State and local income taxes (as a percent)			2.60%	1.70%	1.90%
Foreign income taxes (as a percent)			82.80%	3.80%	2.00%
Income of consolidated partnerships attributable to noncontrolling interests (as a percent)			(6.30%)	(1.10%)	(1.40%)
Non-qualified deferred compensation plan (income) loss (as a percent)			8.20%	(0.90%)	(0.30%)
Excess tax benefits on equity awards (as a percent)			7.60%	(1.40%)
Remeasurement of deferred taxes (as a percent)				(5.00%)
Tax credits (as a percent)			(117.90%)	(4.90%)	(4.30%)
Disposition of China (as a percent)			69.90%
Other (as a percent)			17.50%	(3.10%)	(1.60%)
Total (as a percent)			85.40%	24.10%	31.30%
Income taxes paid			$ 14,000,000	$ 37,200,000	$ 35,100,000
Decrease in liability for unrecognized tax benefits resulting from finalization of current examinations and other issues in the next 12 months			$ 240,000