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Derivative Financial Instruments - Narrative (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 USD ($) interest_rate_swap | Dec. 31, 2020 USD ($) interest_rate_swap
Derivative [Line Items] |  |
Estimated amount to be transferred from accumulated other comprehensive income to earnings | $ 1.0 |
Termination value of derivatives in a net liability position | 36.7 |
Derivative collateral posted | 62.8 |
Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Notional amount of interest rate derivatives | $ 972.7 | $ 985.0
Cash Flow Hedging | Interest rate swap |  |
Derivative [Line Items] |  |
Number of interest rate derivatives held | interest_rate_swap | 4 | 4
Notional amount of interest rate derivatives | $ 60.0 | $ 60.0
Cash Flow Hedging | Interest rate swap | Trust Preferred Debt |  |
Derivative [Line Items] |  |
Notional amount of interest rate derivatives | 26.0 |
Cash Flow Hedging | Interest rate swap | Federal Home Loan Bank Advances |  |
Derivative [Line Items] |  |
Notional amount of interest rate derivatives | 10.0 |
Cash Flow Hedging | Interest rate swap | Brokered Deposit |  |
Derivative [Line Items] |  |
Notional amount of interest rate derivatives | $ 24.0 |

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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80845-113994 + Details
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- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624258-113959 + Details
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- Definition Number of interest rate derivative instruments held by the entity at the reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 + Details
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