Income Taxes - Reconciliation and Tax Act (Details) - USD ($)		3 Months Ended	12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Income Tax Expense
Tax at U.S. federal statutory rate			$ 1,060,000	$ 1,406,000	$ 49,120,000
State and local income taxes			79,000	150,000	2,432,000
Foreign income taxes			5,058,000	4,879,000	5,306,000
Income of consolidated partnerships attributable to noncontrolling interests			(177,000)	(371,000)	(1,554,000)
Non-qualified deferred compensation plan (income) loss			(1,260,000)	483,000	(1,236,000)
Excess tax (benefits) expense on equity awards			(212,000)	447,000	(1,879,000)
Preferred stock option mark-to-market adjustment			1,338,000
Remeasurement of deferred taxes		$ (7,000,000.0)			(7,020,000)
Tax credits			(6,128,000)	(6,945,000)	(6,909,000)
Disposition of China				4,118,000
Other			(369,000)	(1,543,000)	(4,443,000)
Total income taxes			$ (611,000)	$ 2,624,000	$ 33,817,000
Income Tax Rate
Tax at U.S. federal statutory rate (as a percent)	21.00%		21.00%	21.00%	35.00%
State and local income taxes (as a percent)			1.60%	2.20%	1.70%
Foreign income taxes (as a percent)			100.20%	72.90%	3.80%
Income of consolidated partnerships attributable to noncontrolling interests (as a percent)			(3.50%)	(5.60%)	(1.10%)
Non-qualified deferred compensation plan (income) loss (as a percent)			(25.00%)	7.20%	(0.90%)
Excess tax (benefits) expense on equity awards (as a percent)			(4.20%)	6.70%	(1.40%)
Preferred stock option mark-to-market adjustment (as a percent)			26.50%
Remeasurement of deferred taxes (as a percent)					(5.00%)
Tax credits (as a percent)			(121.40%)	(103.70%)	(4.90%)
Disposition of China (as a percent)				61.50%
Other (as a percent)			(7.30%)	(23.00%)	(3.10%)
Total (as a percent)			(12.10%)	39.20%	24.10%
Income taxes (received) paid			$ (6,200,000)	$ 14,000,000.0	$ 37,200,000
Decrease in liability for unrecognized tax benefits resulting from finalization of current examinations and other issues in the next 12 months			$ 86,000