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Long-Term Debt - Long Term Debt (Details) $ in Thousands, kr in Millions	Sep. 28, 2019 USD ($)	Sep. 28, 2019 DKK (kr)	Dec. 31, 2018 USD ($)
Debt Instrument
Unamortized debt issuance costs and original issue discount	$ (11,189)		$ (11,417)
Long-term debt	1,514,364		1,477,892
Current maturities of long-term debt	(67,817)		(54,930)
Long-term debt net of current maturities	1,446,547		1,422,962
Senior notes
Debt Instrument
Long-term debt, gross	$ 800,000		800,000
Senior notes \| Minimum
Debt Instrument
Effective interest rate (percent)	4.63%	4.63%
Senior notes \| Maximum
Debt Instrument
Effective interest rate (percent)	4.88%	4.88%
Term Loan \| Term Loan
Debt Instrument
Long-term debt, gross	$ 592,794		474,058
Unamortized debt issuance costs and original issue discount	$ (600)
Term Loan \| Term Loan \| Minimum
Debt Instrument
Effective interest rate (percent)	1.30%	1.30%
Term Loan \| Term Loan \| Maximum
Debt Instrument
Effective interest rate (percent)	4.33%	4.33%
Term Loan \| Finance leases and other financing arrangements
Debt Instrument
Long-term debt, gross	$ 101,649		98,914
Term Loan \| Finance leases and other financing arrangements \| Minimum
Debt Instrument
Effective interest rate (percent)	1.90%	1.90%
Term Loan \| Finance leases and other financing arrangements \| Maximum
Debt Instrument
Effective interest rate (percent)	6.38%	6.38%
Mortgage notes
Debt Instrument
Long-term debt, gross	$ 27,900	kr 190.4	30,375
Effective interest rate (percent)	1.65%	1.65%
Line of Credit \| Revolving credit facilities
Debt Instrument
Long-term debt, gross	$ 3,017		85,000
Effective interest rate (percent)	4.45%	4.45%
Line of Credit \| Revolving credit facilities \| Minimum
Debt Instrument
Effective interest rate (percent)	3.90%	3.90%
Line of Credit \| Revolving credit facilities \| Maximum
Debt Instrument
Effective interest rate (percent)	6.00%	6.00%
Installment notes for stock
Debt Instrument
Long-term debt, gross	$ 205		$ 962
Effective interest rate (percent)	5.00%	5.00%