Derivative Financial Instruments (Details Textual) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Derivatives, Fair Value [Line Items]
Net gains on derivatives	$ 9.0	$ 1.0
Commitment to Originate Mortgage Loans
Derivatives, Fair Value [Line Items]
Interest rate lock agreements, aggregate principal balance	490.0
No Commitment to Originate Mortgage Loans
Derivatives, Fair Value [Line Items]
Mortgage loans held-for-sale, net	65.1
Forward Sales of Mortgage Backed Securities
Derivatives, Fair Value [Line Items]
Interest rate lock agreements, aggregate principal balance	$ 320.5

The notional amount of forward rate commitments and futures contracts to hedge against mortgage servicing rights.

No definition available.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

+ Details

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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.

+ References

No definition available.

+ Details

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- Definition

Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=120238483&loc=d3e48678-111004

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- Details

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- Details

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- Details

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