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v3.19.3.a.u2

Securities (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Debt Securities, Trading, and Equity Securities, FV-NI, Total | $ 0 | $ 0 |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities | 0 | 0 | $ 0
Proceeds from Sale of Debt Securities, Available-for-sale | 26,400,000 | 120,300,000 | $ 112,400,000
Non-qualified Deferred Compensation Plan [Member] | Other Assets [Member] |  |  |
Deferred Compensation Plan, Amounts Held in Rabbi Trust | $ 20,000,000.0 | $ 17,300,000 |
Collateralized Mortgage Obligations by Commercial Real Estate [Member] |  |  |
Private Issue Collateralized Mortgage Obligations, Number |  | 0 |

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