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Debt - Redemptions (Details) - USD ($) $ in Thousands			12 Months Ended
	Sep. 02, 2020	Apr. 02, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument, Redemption [Line Items]
Redemption percentage		102.625%
(Gain) loss on extinguishment of debt	$ 3,300	$ 10,400	$ 13,700	$ 0	$ 0
Unamortized discount	2,600	1,900
Unamortized premium	700	600
Accrued interest paid	$ 6,900	$ 4,600
4.00% Senior Notes
Debt Instrument, Redemption [Line Items]
Interest rate			4.00%
5.00% Senior Notes
Debt Instrument, Redemption [Line Items]
Interest rate	5.00%		5.00%
Redeemed aggregate principal amount	$ 550,000
5.00% Senior Notes | August 15, 2023
Debt Instrument, Redemption [Line Items]
Redemption percentage			102.00%
5.00% Senior Notes | August 15, 2024
Debt Instrument, Redemption [Line Items]
Redemption percentage			101.333%
5.00% Senior Notes | August 15, 2025
Debt Instrument, Redemption [Line Items]
Redemption percentage			100.667%
5.00% Senior Notes | August 15, 2026 and thereafter
Debt Instrument, Redemption [Line Items]
Redemption percentage			100.00%
5.25% Senior Notes
Debt Instrument, Redemption [Line Items]
Interest rate		5.25%	5.25%
Redeemed aggregate principal amount		$ 300,000
Principal amount of notes redeemed plus associated premium		$ 307,900

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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