Fair Value Measurements (Details) $ in Millions	Jun. 30, 2022 USD ($)
1.5% Convertible Unsecured Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	$ 19.5
4.75% Convertible Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Principal amount	135.0
Fair Value, Inputs, Level 2 | Fair Value | 1.5% Convertible Unsecured Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	19.0
Fair Value, Inputs, Level 2 | Fair Value | 4.75% Convertible Senior Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	$ 123.8