Fair Value of Financial Instruments - Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 29, 2019	Dec. 30, 2018	Sep. 30, 2018
Assets:
Available-for-sale securities	$ 1,148	$ 914	$ 2,346
Derivatives	54,030	26,076	20,079
Total assets	55,178	26,990	22,425
Liabilities:
Derivatives	11,508	1,610	2,113
Option agreement	22,196	23,440	23,460
Total liabilities	33,704	25,050	25,573
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Available-for-sale securities	1,148	914	2,346
Derivatives	0	0	0
Total assets	1,148	914	2,346
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	54,030	26,076	20,079
Total assets	54,030	26,076	20,079
Liabilities:
Derivatives	11,508	1,610	2,113
Option agreement	0	0	0
Total liabilities	11,508	1,610	2,113
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	22,196	23,440	23,460
Total liabilities	$ 22,196	$ 23,440	$ 23,460