Debt - Convertible Senior Notes Due 2029 (Details)		1 Months Ended	3 Months Ended
	Dec. 12, 2022 day $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Unamortized debt issuance costs | $			$ (5,663,000)	$ (6,045,000)	$ (7,232,000)
2029 Convertible Notes | Common Class A
Debt Instrument [Line Items]
Conversion rate per $1,000 principal amount		0.0890313
2029 Convertible Notes | Senior Notes
Debt Instrument [Line Items]
Principle amount | $		$ 230,000,000.0	$ 230,000,000.0
Stated interest rate		3.75%
Effective interest rate			4.28%
Conversion price, per share (in dollars per share) | $ / shares	$ 11.23
Unamortized debt issuance costs | $			$ (5,495,000)	$ (5,744,000)	$ (6,472,000)
2029 Convertible Notes | Senior Notes | Debt Conversion, Condition One
Debt Instrument [Line Items]
Threshold trading days (whether or not consecutive)	20
Threshold consecutive trading days	30
Threshold percentage of stock price trigger	130.00%
2029 Convertible Notes | Senior Notes | Debt Conversion, Condition One | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Threshold trading days (whether or not consecutive)	20
Threshold consecutive trading days	30
Threshold percentage of stock price trigger	130.00%
Repurchase price, percent of principal amount	100.00%
2029 Convertible Notes | Senior Notes | Debt Conversion, Condition Two
Debt Instrument [Line Items]
Threshold consecutive trading days	5
Threshold percentage of stock price trigger	98.00%
Business day threshold	5