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Convertible Senior Notes, Net - Summary of Note Terms (Details) - Convertible Debt	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Principal Amount	$ 575,000,000	$ 575,000,000
Conversion rate basis, principal amount	$ 1,000
2022 Notes
Debt Instrument [Line Items]
Principal Amount		$ 345,000,000		$ 345,000,000.0
Coupon Rate		4.75%		4.75%
Effective Rate		5.60%
Conversion Rate	0.0502260	0.0502260
Remaining Period of Amortization	1 year 1 month 24 days	1 year 7 months 24 days
2023 Notes
Debt Instrument [Line Items]
Principal Amount		$ 230,000,000	$ 230,000,000.0
Coupon Rate		5.38%	5.375%
Effective Rate		6.16%
Conversion Rate	0.0487187	0.0487187
Remaining Period of Amortization	2 years 3 months 14 days	2 years 9 months 14 days

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