Borrowings - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 20, 2021 USD ($) day $ / shares shares	May 31, 2020 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Jan. 31, 2023 USD ($)
ULT Warehouse Credit Facility | Revolving Credit Facility
Schedule of Borrowings [Line Items]
Maximum borrowing capacity		$ 175.0
Redemption price (in percent)		100.00%
Maximum advance rate (in percent)			72.50%		72.50%		72.50%
ULT Warehouse Credit Facility | Minimum | Revolving Credit Facility
Schedule of Borrowings [Line Items]
Monthly unused fee (in percent)		0.15%
ULT Warehouse Credit Facility | Maximum | Revolving Credit Facility
Schedule of Borrowings [Line Items]
Monthly unused fee (in percent)		1.00%
UAWT Warehouse Credit Facility | Revolving Credit Facility | Primary Beneficiary
Schedule of Borrowings [Line Items]
Maximum borrowing capacity								$ 200.0
Maximum advance rate					80.00%		82.50%
2026 ("Notes")
Schedule of Borrowings [Line Items]
Convertible notes payable			$ 651.5		$ 651.5		$ 649.9
Purchase of capped calls	$ 58.5
Initial conversion price (in dollars per share) | $ / shares	$ 285.26
Initial cap price (in dollars per share) | $ / shares	$ 400.36
Capped call cover (in shares) | shares	2.3
2026 ("Notes") | Fair Value, Inputs, Level 2
Schedule of Borrowings [Line Items]
Fair value of convertible senior notes			444.6		444.6		$ 364.8
2026 ("Notes") | Convertible Debt
Schedule of Borrowings [Line Items]
Aggregate principal amount	$ 661.3
Stated interest rate	0.25%
Additional aggregate principal	$ 86.3
Net proceeds from sale of the notes	$ 645.5
Initial conversion rate (in shares)	0.003506
Initial conversion price (in dollars per share) | $ / shares	$ 285.26
Percent of the principal amount	100.00%
2026 ("Notes") | Convertible Debt | Conversion Period One
Schedule of Borrowings [Line Items]
Trading days | day	20
Consecutive trading days | day	30
Conversion price maximum threshold	130.00%
2026 ("Notes") | Convertible Debt | Conversion Period Two
Schedule of Borrowings [Line Items]
Trading days | day	5
Consecutive trading days | day	5
Percentage of the last reported sale price	98.00%
2026 ("Notes") | Convertible Debt | Conversion Period Three
Schedule of Borrowings [Line Items]
Redemption price (in percent)	100.00%
Trading days | day	20
Consecutive trading days | day	30
Conversion price maximum threshold	130.00%
Gross debt issuance cost	$ 15.7
Amortization of debt issuance costs			$ 0.8	$ 0.8	$ 1.5	$ 1.5
Effective interest rate			0.70%		0.70%
Secured Overnight Financing Rate | ULT Warehouse Credit Facility | Minimum | Revolving Credit Facility
Schedule of Borrowings [Line Items]
Basis spread on variable rate		2.75%
Secured Overnight Financing Rate | ULT Warehouse Credit Facility | Maximum | Revolving Credit Facility
Schedule of Borrowings [Line Items]
Basis spread on variable rate		4.13%
UAWT Benchmark Rate | UAWT Warehouse Credit Facility | Minimum | Revolving Credit Facility | Primary Beneficiary
Schedule of Borrowings [Line Items]
Basis spread on variable rate							3.00%
UAWT Benchmark Rate | UAWT Warehouse Credit Facility | Maximum | Revolving Credit Facility | Primary Beneficiary
Schedule of Borrowings [Line Items]
Basis spread on variable rate							4.00%