Income Taxes - Reconciliation and Tax Act (Details) - USD ($)	12 Months Ended
	Dec. 27, 2020	Dec. 29, 2019	Dec. 30, 2018
Income Tax Expense
Tax at U.S. federal statutory rate	$ 15,826,000	$ 1,060,000	$ 1,406,000
State and local income taxes	1,149,000	79,000	150,000
Foreign income taxes	6,463,000	5,058,000	4,879,000
Income of consolidated partnerships attributable to noncontrolling interests	(603,000)	(177,000)	(371,000)
Non-qualified deferred compensation plan (income) loss	(898,000)	(1,260,000)	483,000
Excess tax (benefits) expense on equity awards	(2,029,000)	(212,000)	447,000
Preferred stock option mark-to-market adjustment		1,338,000
Tax credits	(6,002,000)	(6,128,000)	(6,945,000)
Disposition of China			4,118,000
Other	842,000	(369,000)	(1,543,000)
Total income taxes	$ 14,748,000	$ (611,000)	$ 2,624,000
Income Tax Rate
Tax at U.S. federal statutory rate (as a percent)	21.00%	21.00%	21.00%
State and local income taxes (as a percent)	1.50%	1.60%	2.20%
Foreign income taxes (as a percent)	8.60%	100.20%	72.90%
Income of consolidated partnerships attributable to noncontrolling interests (as a percent)	(0.80%)	(3.50%)	(5.60%)
Non-qualified deferred compensation plan (income) loss (as a percent)	(1.20%)	(25.00%)	7.20%
Excess tax (benefits) expense on equity awards (as a percent)	(2.70%)	(4.20%)	6.70%
Preferred stock option mark-to-market adjustment (as a percent)		26.50%
Tax credits (as a percent)	(8.00%)	(121.40%)	(103.70%)
Disposition of China (as a percent)			61.50%
Other (as a percent)	1.10%	(7.30%)	(23.00%)
Total (as a percent)	19.60%	(12.10%)	39.20%
Income taxes (received) paid	$ 19,300,000	$ (6,200,000)	$ 14,000,000.0
Decrease in liability for unrecognized tax benefits resulting from finalization of current examinations and other issues in the next 12 months	$ 140,000