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Loans Held for Sale - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Loans held-for-sale (including nonperforming loans)				$ 200		$ 6,200
Carrying value of consumer loans sold			$ 521,800		$ 521,800
Investment securities held to maturity				1,178,370		$ 840,259
Cash proceeds from sale of consumer installment loans				409,503	$ 136,920
Consumer Loan, Held-For-Sale | Personal And Other Installment Loans
Debt Securities, Available-for-sale [Line Items]
Carrying value of consumer loans sold	$ 556,700
Consumer Loan, Held-For-Sale | Other Installment Loans
Debt Securities, Available-for-sale [Line Items]
Carrying value of consumer loans sold		$ 154,000
Variable Interest Entity, Not Primary Beneficiary
Debt Securities, Available-for-sale [Line Items]
Investment securities held to maturity				$ 436,800
Cash proceeds from sale of consumer installment loans	$ 115,100

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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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The cash inflow associated with the sale of receivables arising from the financing of goods and services.

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