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Fair Value Measurements - Narrative (Details)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 17, 2020 USD ($)
Embedded Derivative Financial Instruments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
10 percent decrease in stock price volatility, fair value	$ 131,700,000
10 percent increase in stock price volatility, fair value	165,600,000
Capped Call
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
10 percent decrease in stock price volatility, fair value	88,900,000
10 percent increase in stock price volatility, fair value	$ 78,500,000
Senior Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, face amount			$ 287,500,000
2020 Cash Exchangeable Senior Notes | Senior Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt instrument, face amount		$ 287,500,000
Measurement Input, Stock Price Volatility | Embedded Derivative Financial Instruments
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.34
Measurement Input, Stock Price Volatility | Capped Call
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative liability, measurement input	0.34

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