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Securitizations Net - Summary of Outstanding Balance Net of Discounts and Deals Costs of Securities and Effective Interest Rate (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Securitizations, net	$ 1,623,674	$ 1,670,930	$ 1,579,019
Average outstanding balance	$ 1,574,999	$ 1,728,131
Effective interest rate	4.68%	4.53%
Securitizations
Debt Instrument [Line Items]
Interest expense - portfolio related	$ 55,288	$ 58,749

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of interest expense incurred on a debt or other obligation to related party.

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- Definition

Securitizations average outstanding balance.

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- Definition

Securitizations effective interest rate.

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- Definition

Securitizations, net.

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