Fair Value of Financial Instruments - Financial Assets and Liabilities (Details) - Recurring - USD ($) $ in Thousands	Sep. 26, 2020	Dec. 31, 2019
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value		$ 1,528,146
Assets:
Cash equivalents	$ 325,121
Liabilities:
Debt, recorded in long-term debt and current maturities of long-term debt	1,781,354
Carrying Amount | Other Current Assets
Assets:
Derivative assets	3,097	1,372
Carrying Amount | Other Noncurrent Assets
Assets:
Derivative assets		6
Carrying Amount | Accrued Expenses And Deferred Credits
Liabilities:
Derivative liabilities	3,679	4,068
Carrying Amount | Deferred Credits And Other Liabilities
Liabilities:
Derivative liabilities	1,213
Total Fair Value
Assets:
Cash equivalents	325,121
Liabilities:
Debt, recorded in long-term debt and current maturities of long-term debt	1,791,474	1,554,425
Total Fair Value | Other Current Assets
Assets:
Derivative assets	3,097	1,372
Total Fair Value | Other Noncurrent Assets
Assets:
Derivative assets		6
Total Fair Value | Accrued Expenses And Deferred Credits
Liabilities:
Derivative liabilities	3,679	4,068
Total Fair Value | Deferred Credits And Other Liabilities
Liabilities:
Derivative liabilities	1,213
Total Fair Value | Level 1
Assets:
Cash equivalents	0
Liabilities:
Debt, recorded in long-term debt and current maturities of long-term debt	0	0
Total Fair Value | Level 1 | Other Current Assets
Assets:
Derivative assets	0	0
Total Fair Value | Level 1 | Other Noncurrent Assets
Assets:
Derivative assets		0
Total Fair Value | Level 1 | Accrued Expenses And Deferred Credits
Liabilities:
Derivative liabilities	0	0
Total Fair Value | Level 1 | Deferred Credits And Other Liabilities
Liabilities:
Derivative liabilities	0
Total Fair Value | Level 2
Assets:
Cash equivalents	325,121
Liabilities:
Debt, recorded in long-term debt and current maturities of long-term debt	1,791,474	1,554,425
Total Fair Value | Level 2 | Other Current Assets
Assets:
Derivative assets	3,097	1,372
Total Fair Value | Level 2 | Other Noncurrent Assets
Assets:
Derivative assets		6
Total Fair Value | Level 2 | Accrued Expenses And Deferred Credits
Liabilities:
Derivative liabilities	3,679	4,068
Total Fair Value | Level 2 | Deferred Credits And Other Liabilities
Liabilities:
Derivative liabilities	1,213
Total Fair Value | Level 3
Assets:
Cash equivalents	0
Liabilities:
Debt, recorded in long-term debt and current maturities of long-term debt	0	0
Total Fair Value | Level 3 | Other Current Assets
Assets:
Derivative assets	0	0
Total Fair Value | Level 3 | Other Noncurrent Assets
Assets:
Derivative assets		0
Total Fair Value | Level 3 | Accrued Expenses And Deferred Credits
Liabilities:
Derivative liabilities	0	$ 0
Total Fair Value | Level 3 | Deferred Credits And Other Liabilities
Liabilities:
Derivative liabilities	$ 0