Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 29, 2019
Other long-term assets:
Equity investments with readily determinable fair value	$ 331,293	$ 173,908
Total assets	341,217	191,408
Other long-term liabilities:
Interest rate swap contracts	633	373
Total liabilities	633	373
Level 3
Other long-term assets:
Total assets	9,924	17,500
Other long-term liabilities:
Total liabilities	0	0
Level 2
Other long-term assets:
Total assets	0	0
Other long-term liabilities:
Total liabilities	633	373
Level 1
Other long-term assets:
Total assets	331,293	173,908
Other long-term liabilities:
Total liabilities	0	0
Other long-term assets:
Other long-term assets:
Equity investments with fair value option ("FVO")	9,924	17,500
Equity investments with readily determinable fair value	331,293	173,908
Other long-term assets: | Level 3
Other long-term assets:
Equity investments with fair value option ("FVO")	9,924	17,500
Equity investments with readily determinable fair value	0	0
Other long-term assets: | Level 2
Other long-term assets:
Equity investments with fair value option ("FVO")	0	0
Equity investments with readily determinable fair value	0	0
Other long-term assets: | Level 1
Other long-term assets:
Equity investments with fair value option ("FVO")	0	0
Equity investments with readily determinable fair value	331,293	173,908
Other long-term liabilities:
Other long-term liabilities:
Interest rate swap contracts	633	373
Other long-term liabilities: | Level 3
Other long-term liabilities:
Interest rate swap contracts	0	0
Other long-term liabilities: | Level 2
Other long-term liabilities:
Interest rate swap contracts	633	373
Other long-term liabilities: | Level 1
Other long-term liabilities:
Interest rate swap contracts	$ 0	$ 0