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Derivatives and Hedging Activities - Notional Amounts and Estimated Fair Values of Derivatives (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Derivative [Line Items] |  |
Derivative Asset, Notional Amount | $ 2,290.7 | $ 1,691.2
Derivative Assets, Estimated Fair Value | 45.2 | 28.1
Derivative Liability, Notional Amount | 2,449.0 | 1,103.9
Derivative Liabilities, Estimated Fair Value | 159.6 | 18.2
Derivative Instruments and Hedges, Assets | 191.9 | 695.6
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease) | 8.1 | (4.4)
Not Designated as Hedging Instrument | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Derivative Asset, Notional Amount | 1,728.1 | 913.9
Derivative Assets, Estimated Fair Value | 41.6 | 22.2
Derivative Liability, Notional Amount | 1,728.1 | 913.9
Derivative Liabilities, Estimated Fair Value | 153.9 | 18.1
Not Designated as Hedging Instrument | Interest Rate Lock Commitments [Member] |  |
Derivative [Line Items] |  |
Derivative Asset, Notional Amount | 0.0 | 77.3
Derivative Assets, Estimated Fair Value | 0.0 | 1.8
Derivative Liability, Notional Amount | 14.8 | 0.0
Derivative Liabilities, Estimated Fair Value | 0.0 | 0.0
Not Designated as Hedging Instrument | Forward Contracts [Member] |  |
Derivative [Line Items] |  |
Derivative Asset, Notional Amount | 12.6 | 0.0
Derivative Liability, Notional Amount | 0.0 | 102.4
Derivative Liabilities, Estimated Fair Value | 0.0 | 0.0
Designated as Hedging Instrument | Interest Rate Swap [Member] |  |
Derivative [Line Items] |  |
Derivative Asset, Notional Amount | 550.0 | 700.0
Derivative Assets, Estimated Fair Value | 3.5 | 4.1
Derivative Liability, Notional Amount | 300.0 | 87.6
Derivative Liabilities, Estimated Fair Value | $ 0.3 | $ 0.1

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
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