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Contractual interest rate for funds borrowed, under the debt agreement.

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Carrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Weighted average maturity (weighted by amount of the agreement) of repurchase agreements with the counterparty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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Carrying value, as of the balance sheet date, of securities sold under agreements to repurchase where the transferor maintains effective control over the assets, accounting for them as secured debt.

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Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions.

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New liabilities assumed during the reporting period that are subordinated to claims of general creditors.

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Short-term Borrowings and Long-term Debt - Narrative (Details) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
	Jul. 01, 2022	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Underlying assets pledged as collateral		$ 66.4	$ 133.5
Payables to Securitization Holders
Debt Instrument [Line Items]
Restricted cash		12.5	13.5
Payables to Securitization Holders \| Loans Held for Investment and Loans Held for Sale
Debt Instrument [Line Items]
Loans pledged as collateral			$ 148.3
Payables to Securitization Holders \| Consolidated VIEs \| Loans Held for Investment \| Loans Related to Consolidation of Securitization Trust
Debt Instrument [Line Items]
Loans pledged as collateral		82.2
Subordinated Notes \| Radius Bancorp, Inc. Merger
Debt Instrument [Line Items]
Subordinated notes assumed		$ 15.3
Debt instrument, stated interest rate		6.50%
PPPLF
Debt Instrument [Line Items]
Outstanding borrowings		$ 391.9
Level 3 Inputs \| Asset-backed Securities Related to Structured Program Transactions, Senior Securities \| Fair Value, Measurements, Recurring \| Measurement Input, Expected Term
Debt Instrument [Line Items]
Weighted-average estimated life of contractual repurchase agreements		8 months 12 days	10 months 24 days
Level 3 Inputs \| Asset-backed Securities Related to Structured Program Transactions, Subordinated Securities \| Fair Value, Measurements, Recurring \| Measurement Input, Expected Term
Debt Instrument [Line Items]
Weighted-average estimated life of contractual repurchase agreements		1 year 3 months 18 days	1 year 4 months 24 days
London Interbank Offered Rate (LIBOR) \| Securities Sold under Agreements to Repurchase \| Minimum
Debt Instrument [Line Items]
Borrowings interest rate spread (percent)		2.51%	3.05%
London Interbank Offered Rate (LIBOR) \| Securities Sold under Agreements to Repurchase \| Maximum
Debt Instrument [Line Items]
Borrowings interest rate spread (percent)		6.72%	4.00%
London Interbank Offered Rate (LIBOR) \| Subordinated Notes \| Radius Bancorp, Inc. Merger \| Subsequent Event
Debt Instrument [Line Items]
Borrowings interest rate spread (percent)	4.64%
Credit Facilities and Securities Sold under Repurchase Agreements
Debt Instrument [Line Items]
Aggregate debt outstanding under repurchase transactions		$ 46.1	$ 105.0
Payable to Securitization Note and Certificate Holders at Fair Value \| Consolidated VIEs \| Loans Held for Investment \| Loans Related to Consolidation of Securitization Trust
Debt Instrument [Line Items]
Payable to Structured Program note and certificate holders		$ 89.3	$ 152.8