Securitizations and Variable Interest Entities - Summary of Select Information Related to VIEs (Details) - USD ($) $ in Thousands		Jun. 30, 2023	Dec. 31, 2022
Assets:
Restricted cash	[1]	$ 34,792	$ 67,454
Total securities available for sale		523,579	345,702
Loans held for investment at fair value		5,178,186	4,705,302
Retail and certificate loans held for investment at fair value	[1]	26,837	55,425
Other assets	[1]	493,383	500,306
Total assets		8,342,506	7,979,747
Liabilities:
Borrowings	[1]	15,675	74,858
Retail Notes And Certificates At Fair Value		26,837	55,425
Other liabilities	[1]	250,936	292,617
Total liabilities		7,136,983	6,815,453
Total
Assets:
Restricted cash		4,330	8,048
Total securities available for sale		160,905	17,717
Loans held for investment at fair value		1,753	3,994
Retail and certificate loans held for investment at fair value		932	1,946
Other assets		11,718	10,670
Total assets		179,638	42,375
Liabilities:
Borrowings		4,460	8,085
Retail Notes And Certificates At Fair Value		932	1,946
Other liabilities		9	29
Total liabilities		5,401	10,060
Total net assets (maximum loss exposure)		174,237	32,315
Consolidated
Assets:
Restricted cash		4,330	8,048
Total securities available for sale		0	0
Loans held for investment at fair value		1,753	3,994
Retail and certificate loans held for investment at fair value		932	1,946
Other assets		23	206
Total assets		7,038	14,194
Liabilities:
Borrowings		4,460	8,085
Retail Notes And Certificates At Fair Value		932	1,946
Other liabilities		9	29
Total liabilities		5,401	10,060
Total net assets (maximum loss exposure)		1,637	4,134
Unconsolidated
Assets:
Restricted cash		0	0
Total securities available for sale		160,905	17,717
Loans held for investment at fair value		0	0
Retail and certificate loans held for investment at fair value		0	0
Other assets		11,695	10,464
Total assets		172,600	28,181
Liabilities:
Borrowings		0	0
Retail Notes And Certificates At Fair Value		0	0
Other liabilities		0	0
Total liabilities		0	0
Total net assets (maximum loss exposure)		$ 172,600	$ 28,181

[1] Includes amounts in consolidated variable interest entities (VIEs). See “Notes to Condensed Consolidated Financial Statements – Note 6. Securitizations and Variable Interest Entities.”