Fair Value of Financial Instruments - Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Dec. 29, 2019	Jun. 30, 2019
Assets:
Available-for-sale securities	$ 2,741	$ 1,296	$ 1,349
Derivatives	28,941	48,973	24,622
Total assets	31,682	50,269	25,971
Liabilities:
Derivatives	2,893	5,733	1,894
Option agreement	20,690	22,145	22,471
Total liabilities	23,583	27,878	24,365
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Available-for-sale securities	2,741	1,296	1,349
Derivatives	0	0	0
Total assets	2,741	1,296	1,349
Liabilities:
Derivatives	0	0	0
Option agreement	0	0	0
Total liabilities	0	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale securities	0	0	0
Derivatives	28,941	48,973	24,622
Total assets	28,941	48,973	24,622
Liabilities:
Derivatives	2,893	5,733	1,894
Option agreement	0	0	0
Total liabilities	2,893	5,733	1,894
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	0	0	0
Derivatives	0	0	0
Total assets	0	0	0
Liabilities:
Derivatives	0	0	0
Option agreement	20,690	22,145	22,471
Total liabilities	$ 20,690	$ 22,145	$ 22,471