Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Securities available for sale at amortized cost		$ 415,726	$ 256,170
Loans held for sale at fair value		$ 90,058	$ 142,370
Preferred stock, par value ($ per share)		$ 0.01	$ 0.01
Preferred stock, authorized (shares)		1,200,000	1,200,000
Preferred stock, issued (shares)		0	0
Preferred stock, outstanding (shares)		0	0
Common stock, par value ($ per share)		$ 0.01	$ 0.01
Common stock, authorized (shares)		180,000,000	180,000,000
Common stock, shares issued (shares)		105,088,761	101,043,924
Common stock, shares outstanding (shares)		105,088,761	101,043,924
Treasury stock (in shares)		7,751	0
Variable Interest Entity [Abstract]
Restricted cash	[1]	$ 66,285	$ 76,460
Loans held for sale at fair value		90,058	142,370
Retail and certificate loans held for investment at fair value	[1]	87,144	229,719
Other loans held for investment at fair value		4,503,726	2,754,737
Other assets	[1]	495,132	302,546
Assets		6,775,074	4,900,319
Retail notes, certificates and secured borrowings at fair value	[1]	87,144	229,719
Payable on Structured Program borrowings	[1]	11,185	65,451
Other liabilities	[1]	320,055	303,951
Total liabilities		5,653,664	4,050,077
Consolidated VIEs
Statement of Financial Position [Abstract]
Loans held for sale at fair value		0	41,734
Variable Interest Entity [Abstract]
Restricted cash		8,600	13,462
Loans held for sale at fair value		0	41,734
Retail and certificate loans held for investment at fair value		2,940	10,281
Other loans held for investment at fair value		6,375	20,929
Other assets		218	584
Assets		18,133	86,990
Retail notes, certificates and secured borrowings at fair value		2,940	10,281
Payable on Structured Program borrowings		11,185	65,451
Other liabilities		39	467
Total liabilities		$ 14,164	$ 76,199

[1] Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below. The following table presents the assets and liabilities of consolidated VIEs, which are included in the Condensed Consolidated Balance Sheets (Balance Sheet) above. The assets in the table below may only be used to settle obligations of consolidated VIEs and are in excess of those obligations. Additionally, the assets and liabilities in the table below include third-party assets and liabilities of consolidated VIEs only and exclude intercompany balances that eliminate in consolidation. September 30, 2022December 31, 2021Assets of consolidated VIEs, included in total assets aboveRestricted cash$8,600 $13,462 Loans held for sale at fair value— 41,734  Retail and certificate loans held for investment at fair value 2,940 10,281 Other loans held for investment at fair value6,375 20,929 Other assets 218 584 Total assets of consolidated VIEs$18,133 $86,990 Liabilities of consolidated VIEs, included in total liabilities aboveRetail notes, certificates and secured borrowings at fair value$2,940 $10,281 Payable on Structured Program borrowings11,185 65,451 Other liabilities39 467 Total liabilities of consolidated VIEs$14,164 $76,199