Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows From Operating Activities:
Net income (loss)	$ 17.2	$ 121.7
Adjustments to reconcile cash provided by operating activities:
Provision for credit losses	506.6	387.9
Depreciation	4.2	4.4
Amortization	9.8	8.4
Provision for deferred income taxes	20.3	21.8
Stock-based compensation	21.5	19.7
Loss on sale of building	23.7	0.0
Other	0.4	0.4
Change in operating assets and liabilities:
Increase in accounts payable and accrued liabilities	14.2	3.3
Increase in income taxes receivable	(35.6)	(5.0)
Decrease in income taxes payable	(80.8)	(2.3)
Decrease in other assets	12.5	18.9
Net cash provided by operating activities	514.0	579.2
Cash Flows From Investing Activities:
Payments to Acquire Debt Securities, Available-for-sale	34.3	20.9
Proceeds from sale of restricted securities available for sale	16.0	7.6
Maturities of restricted securities available for sale	4.9	4.2
Principal collected on Loans receivable	1,610.4	1,593.7
Advances to Dealers	(1,959.1)	(1,470.4)
Purchases of Consumer Loans	(586.4)	(680.9)
Accelerated payments of Dealer Holdback	(33.4)	(24.6)
Payments of Dealer Holdback	(130.5)	(118.3)
Purchases of property and equipment	(0.7)	(2.4)
Proceeds from Sale of Buildings	3.2	0.0
Net cash used in investing activities	(1,109.9)	(712.0)
Cash Flows From Financing Activities:
Borrowings under revolving secured lines of credit	4,505.7	3,509.5
Repayments under revolving secured lines of credit	(4,500.6)	(3,371.5)
Proceeds from secured financing	2,249.9	1,201.0
Repayments of secured financing	(1,365.6)	(1,181.1)
Payments of debt issuance costs	(13.0)	(11.2)
Repurchase of common stock	(251.9)	(22.7)
Proceeds from Issuance of Common Stock	14.6	4.1
Other	3.5	(1.0)
Net cash provided by financing activities	642.6	127.1
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	46.7	(5.7)
Cash and cash equivalents and restricted cash and cash equivalents beginning of period	470.9	417.7
Cash and cash equivalents and restricted cash and cash equivalents end of period	517.6	412.0
Supplemental Disclosure of Cash Flow Information:
Cash paid during the period for interest	182.6	107.5
Cash paid during the period for income taxes, net of refunds	$ 101.2	$ 18.3