Fair Value of Financial Instruments - Fair Value Hierarchy (Details) - Fair value, recurring - USD ($) $ in Thousands	Dec. 27, 2020	Dec. 29, 2019
Assets:
Available-for-sale securities	$ 2,135	$ 1,296
Derivatives	4,794	48,973
Total assets	6,929	50,269
Liabilities:
Derivatives	12,684	5,733
Option agreement	20,602	22,145
Total liabilities	33,286	27,878
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Available-for-sale securities	2,135	1,296
Derivatives	0	0
Total assets	2,135	1,296
Liabilities:
Derivatives	0	0
Option agreement	0	0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Available-for-sale securities	0	0
Derivatives	4,794	48,973
Total assets	4,794	48,973
Liabilities:
Derivatives	12,684	5,733
Option agreement	0	0
Total liabilities	12,684	5,733
Significant Unobservable Inputs (Level 3)
Assets:
Available-for-sale securities	0	0
Derivatives	0	0
Total assets	0	0
Liabilities:
Derivatives	0	0
Option agreement	20,602	22,145
Total liabilities	$ 20,602	$ 22,145