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Fair Value of Financial Instruments - Assumptions Used to Value Mortgage Servicing Rights (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
Prepayment speeds	9.10%	11.82%
Discount rates	8.89%	7.83%
Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
Prepayment speeds	36.51%	37.95%
Discount rates	10.39%	9.09%
Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
Prepayment speeds	15.63%	22.08%
Discount rates	9.32%	8.27%

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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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- Definition

Discount rate used to estimate the fair value of servicing assets and servicing liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122596-111746

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- Definition

Estimated rate of prepayments of principal on servicing assets and servicing liabilities.

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-Topic 860
-SubTopic 50
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