Related Party Transactions - Allianz Transaction (Details) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	May 13, 2025 $ / shares shares	Jul. 31, 2024 director $ / shares shares	Feb. 22, 2024 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) shares	Sep. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Related Party Transaction [Line Items]
Preferred stock tranche liability, at fair value				$ 1,650		$ 1,650			$ 3,940
Gain (loss) on preferred stock tranche liability				500	$ 1,140	2,290	$ 1,140
Equity method investments				135		135			20,403
Related party
Related Party Transaction [Line Items]
Equity method investments				0		0			20,300
Allianz warrant
Related Party Transaction [Line Items]
Warrant liabilities, at fair value				6,600		6,600			6,600
Series A Preferred Stock
Related Party Transaction [Line Items]
Preferred stock				166,924	$ 141,330	166,924	$ 141,330	$ 164,914	142,858	$ 0	$ 0
Series A Preferred Stock | Related party
Related Party Transaction [Line Items]
Preferred stock				$ 166,924		$ 166,924			$ 142,858
Allianz Strategic Investments S.à.r.l. (“Allianz”) | Series A Preferred Stock | Allianz Investment Agreement
Related Party Transaction [Line Items]
Sale of stock, number of shares issued in transaction (in shares) | shares		140,000
Preferred stock, dividend rate, per-dollar amount (in dollars per share) | $ / shares	$ 1,000	$ 1,000
Dividends payable (in percent)		50.00%
Allianz Strategic Investments S.à.r.l. (“Allianz”) | Series A Preferred Stock | Allianz Investment Agreement | Allianz Tranche Right
Related Party Transaction [Line Items]
Number of securities called by warrants or rights (in shares) | shares	18,471		50,000	1,523,289		1,523,289
Value of securities called by warrant or right			$ 50,000
Preferred stock, dividend rate, per-dollar amount (in dollars per share) | $ / shares			$ 1,000
Allianz Strategic Investments S.à.r.l. (“Allianz”) | Class A Common Stock | Allianz Investment Agreement
Related Party Transaction [Line Items]
Sale of stock, number of shares issued in transaction (in shares) | shares		19,318,580.96
Number of directors available for nomination | director		2
Threshold of ownership (in percent)		50.00%
Dividends payable (in percent)		50.00%
Allianz Strategic Investments S.à.r.l. (“Allianz”) | Class A Common Stock | Allianz Investment Agreement | Allianz warrant
Related Party Transaction [Line Items]
Number of securities called by warrants or rights (in shares) | shares		5,000,000