Acquisitions - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Aug. 01, 2024	Jan. 19, 2024	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination [Line Items]
Cash paid for acquisition, net of cash acquired					$ 0	$ 860,407
Issuance of common stock for business acquisitions			$ 3,333	$ 36,692
R8Fin
Business Combination [Line Items]
Net cash acquired		$ 125,900
Cash paid for acquisition, net of cash acquired		$ 89,200
R8Fin | Class A Common Stock
Business Combination [Line Items]
Common stock shares issued by corporation (in shares)		374,601
Equity interests issued and issuable		$ 36,700
ICD Acquisition
Business Combination [Line Items]
Net cash acquired	$ 774,200
Cash paid for acquisition, net of cash acquired	770,900
Cash acquired from acquisition	23,300
Consideration transferred, net of equity issued	773,800
Share-based payment arrangement, accelerated cost			1,400
Prepaid expense	1,400
Revenue			17,200			17,200
Operating loss			300			300
Depreciation and amortization			$ 7,300			$ 7,300
ICD Acquisition | Class A Common Stock
Business Combination [Line Items]
Equity interests issued and issuable	$ 4,500
ICD Acquisition | Class A Common Stock | RSUs and RSAs
Business Combination [Line Items]
Common stock shares issued by corporation (in shares)	41,705
Issuance of common stock for business acquisitions	$ 4,700
Award requisite service period	2 years
Issuance, allocated to consideration transferred for the business combination	$ 3,300
Issuance, amortized into stock-based compensation expense	$ 1,300