Debt - Narrative (Details)		1 Months Ended					3 Months Ended		9 Months Ended
	Aug. 08, 2024 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2021 USD ($) trading_day $ / shares	Dec. 31, 2021 USD ($) consecutive_trading_day $ / shares	Dec. 31, 2021 USD ($) consecutive_business_day $ / shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) $ / shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Stock option, capped calls, initial strike price (in dollars per share) | $ / shares		$ 19.98	$ 19.98	$ 19.98	$ 19.98	$ 19.98
Stock option, capped calls, initial cap price (in dollars per share) | $ / shares		$ 30.16	$ 30.16	$ 30.16	$ 30.16	$ 30.16
Convertible debt issued									$ 18,596,000	$ 0
Gain on extinguishment of debt							$ 147,346,000	$ 0	147,346,000	0
Amortization of debt premium/discount and issuance costs									$ 3,065,000	$ 2,427,000
Class A Common Stock
Debt Instrument [Line Items]
Common stock, par value (in dollars per share) | $ / shares							$ 0.0001		$ 0.0001
Senior Notes
Debt Instrument [Line Items]
Principal	$ 100,000,000						$ 100,000,000		$ 100,000,000
Debt issuance costs							$ 4,900,000		4,900,000
Amortization period of debt issuance costs	3 years 10 months 24 days
Fair value of senior notes	$ 97,000,000
Debt discount	3,000,000
Notes Principal Outstanding	$ 100,000,000
Variable interest rate	9.00%
Term SOFR floor interest rate (percent)	3.00%
Interest rate, end of period (percent)							14.10%
Debt instrument, redemption price, change of control (percent)	103.00%
Debt covenant, restricted cash and cash equivalents, plus unused credit facility commitments available for more than five days at month end							$ 35,000,000		$ 35,000,000
Effective interest rate (as a percent)							16.00%		16.00%
Accrued interest repaid							$ 2,200,000		$ 2,200,000
Amortization of debt premium/discount and issuance costs							$ 100,000		$ 100,000
Senior Notes | Measurement Input Type, Payment Interest Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, measurement input	0.124						0.120		0.120
Senior Notes | Measurement Input Type, Payment Interest Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, measurement input	0.143						0.131		0.131
Senior Notes | Measurement Input Type, Effective Borrowing Rate
Debt Instrument [Line Items]
Debt instrument, measurement input	0.144						0.097		0.097
Senior Notes | Measurement Input Type, Interest Rate Volatility
Debt Instrument [Line Items]
Debt instrument, measurement input	0.230						0.230		0.230
Senior Notes | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, redemption price (percent)	111.00%
Senior Notes | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Debt instrument, redemption price (percent)	108.00%
Senior Notes | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Debt instrument, redemption price (percent)	103.00%
Convertible Senior Notes Due 2026 | Convertible Debt
Debt Instrument [Line Items]
Principal		$ 625,000,000	$ 625,000,000	$ 625,000,000	$ 625,000,000	$ 625,000,000	$ 203,083,000		$ 203,083,000		$ 625,000,000
Interest rate (as a percent)		1.25%	1.25%	1.25%	1.25%	1.25%
Proceeds from the issuance of debt			$ 75,000,000
Proceeds from convertible debt			$ 609,400,000
Debt instrument, convertible, shares issuable (in shares)		0.0500475
Conversion price (in dollars per share) | $ / shares		$ 19.98	$ 19.98	$ 19.98	$ 19.98	$ 19.98
Debt issuance costs		$ 16,200,000	$ 16,200,000	$ 16,200,000	$ 16,200,000	$ 16,200,000
Payments to purchase capped calls									73,400,000
Convertible debt exchanged	$ 421,900,000
Gain on extinguishment of debt	142,200,000
Convertible Senior Notes Due 2026 | Convertible Debt | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days | trading_day				20
Debt instrument, convertible, threshold consecutive trading days | consecutive_trading_day					30
Debt instrument, redemption price (percent)		100.00%
Convertible Senior Notes Due 2026 | Convertible Debt | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger		130.00%
Debt instrument, convertible, threshold trading days | trading_day				20
Debt instrument, convertible, threshold consecutive trading days | consecutive_trading_day					30
Convertible Senior Notes Due 2026 | Convertible Debt | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Debt instrument, convertible, threshold trading days					10	5
Debt instrument, convertible, threshold percent of conversion price triggering convertible feature		98.00%
Convertible Senior Notes Due 2026 | Convertible Debt | Class A Common Stock
Debt Instrument [Line Items]
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001	$ 0.0001
Convertible Senior Notes Due 2026 | Convertible Debt | Class A Common Stock | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger		130.00%
Convertible Senior Notes Due 2030
Debt Instrument [Line Items]
Gain on extinguishment of debt							5,100,000
Debt premium	5,200,000
Debt discount	$ 5,700,000
Convertible Senior Notes Due 2030 | Convertible Debt
Debt Instrument [Line Items]
Debt instrument, convertible, threshold percentage of stock price trigger	130.00%
Debt instrument, redemption price (percent)	100.00%
Amortization period of debt issuance costs	5 years 3 months 18 days
Notes Principal Outstanding	$ 100,000,000
Debt covenant, restricted cash and cash equivalents, plus unused credit facility commitments available for more than five days at month end							31,500,000		31,500,000
Convertible Senior Notes Due 2030 | Senior Notes
Debt Instrument [Line Items]
Principal	100,000,000
Proceeds from the issuance of debt	$ 97,000,000
Amortization period of debt issuance costs	2 years 2 months 12 days
Series 1 Convertible Notes | Convertible Debt
Debt Instrument [Line Items]
Principal	$ 82,300,000						59,391,000		59,391,000
Interest rate (as a percent)	9.00%
Debt issuance costs	$ 21,600,000
Convertible debt exchanged	1,000
Convertible debt issued	82,300,000
Fair value of senior notes	$ 87,500,000
Effective interest rate (as a percent)	16.30%
Accrued interest repaid							1,100,000		1,100,000
Amortization of debt premium/discount and issuance costs							300,000		300,000
Conversion of debt, shares issued (in shares) | shares	687.8525
Convertible conversion price (in dollars per share) | $ / shares	$ 1.45
Fair value of embedded derivative liability	$ 25,200,000
Series 1 Convertible Notes | Convertible Debt | Class A Common Stock
Debt Instrument [Line Items]
Convertible debt exchanged							$ 22,900,000
Conversion of debt, shares issued (in shares) | shares							20,328,198
Series 2 Convertible Notes | Convertible Debt
Debt Instrument [Line Items]
Principal	$ 192,000,000						$ 191,918,000		191,918,000
Interest rate (as a percent)	11.50%
Debt issuance costs	$ 33,300,000
Convertible debt exchanged	1,000
Convertible debt issued	192,000,000
Fair value of senior notes	$ 186,200,000
Effective interest rate (as a percent)	16.30%
Accrued interest repaid							3,800,000		3,800,000
Amortization of debt premium/discount and issuance costs							600,000		$ 600,000
Conversion of debt, shares issued (in shares) | shares	412.7115
Convertible conversion price (in dollars per share) | $ / shares	$ 2.42
Fair value of embedded derivative liability	$ 24,000,000
Series 2 Convertible Notes | Convertible Debt | Class A Common Stock
Debt Instrument [Line Items]
Convertible debt exchanged							$ 50,000
Conversion of debt, shares issued (in shares) | shares							33,069