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Long-Term Debt - 2022 Notes and 2021 Notes (Details) - USD ($) $ in Thousands			12 Months Ended
	Apr. 01, 2020	Apr. 05, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instruments
Repayments of long-term debt			$ 1,204,375	$ 2,071,750	$ 605,636
Interest paid			99,797	97,451	86,758
Debt extinguishment loss			$ 3,971	3,653	$ 2,450
2022 Notes
Debt Instruments
Redemption rate (as a percent)	100.00%
Repayments of long-term debt	$ 350,000
Interest paid	10,500
Debt extinguishment loss	$ 4,000
2021 Notes
Debt Instruments
Redemption rate (as a percent)		100.00%
Repayments of long-term debt		$ 350,000
Interest paid		$ 200
Debt extinguishment loss				$ 3,700

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