Leases - Balance Sheet Location and Values of Lease Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease assets	$ 306,077	$ 298,393	[1]
Finance lease assets	45,931	34,858
Lease assets held for sale	24,148	0
Total lease assets	376,156	333,251
Current operating lease liabilities	50,130	54,048
Current finance lease liabilities	4,196	10,803
Lease liabilities held for sale	24,136	0
Total current lease liabilities	78,462	64,851
Noncurrent operating lease liabilities	268,790	253,992	[1]
Noncurrent finance lease liabilities	39,850	22,274
Total noncurrent lease liabilities	308,640	276,266
Total lease liabilities	$ 387,102	$ 341,117
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:DebtCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:LongTermDebtNoncurrent

[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.