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Summary of Significant Accounting Policies (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($) segment item class	Sep. 30, 2021 segment	Dec. 31, 2021 USD ($)
Number of reportable segments | segment	3	4
Cash collateral receivable offset against gross derivative asset positions	$ 42.8
Cash collateral offset against derivative liability positions			$ 1.8
Number of separate classes of servicing rights used for risk management purposes | class	2
Unrecognized accrued taxes, interest and penalties	$ 0.0		0.0
The number of consecutive months contractual payments that must be received on a loan in non-accrual status before resuming recognition of interest income | item	3
Borrowings under credit facilities | Maximum
Maturity period	2 years
Restricted cash
Cash collateral not offset against derivative liability positions			$ 9.0

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The number of consecutive months contractual payments that must be received on a loan in non-accrual status before resuming recognition of interest income.

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Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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