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v3.22.2.2

Investment Securities (Narrative) (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 USD ($) Security | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) Security | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) Security
Schedule Of Investments [Line Items] |  |  |  |  |
Securities pledged as collateral | $ 866,400,000 |  | $ 866,400,000 |  | $ 637,800,000
Number of security positions, unrealized loss position | Security | 226 |  | 226 |  | 116
Number of security positions, unrealized loss position for more than 12 months | Security | 101 |  | 101 |  | 28
Securities, 12 months or longer, Fair Value | $ 602,243,000 |  | $ 602,243,000 |  | $ 172,180,000
Securities, 12 months or longer, Unrealized Losses | $ 133,550,000 |  | $ 133,550,000 |  | $ 4,727,000
Number of security positions, unrealized loss position for less than 12 months | Security | 125 |  | 125 |  | 88
Securities, Less than 12 months, Fair Value | $ 362,944,000 |  | $ 362,944,000 |  | $ 773,484,000
Securities, Less than 12 months, Unrealized Losses | 50,739,000 |  | 50,739,000 |  | 10,039,000
Available for sale securities, allowance for credit loss | 0 |  | 0 |  | 0
Securities held to maturity, Amortized Cost | 197,543,000 |  | 197,543,000 |  | 205,586,000
Investment securities, past due | 3,814,783,000 |  | 3,814,783,000 |  | 3,631,355,000
Investment securities, nonaccrual | 7,550,000 |  | 7,550,000 |  | 11,369,000
Total Past Due [Member] |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |
Investment securities, past due | 13,247,000 |  | 13,247,000 |  | 9,467,000
Municipal Bonds [Member] |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |
Securities held to maturity, Amortized Cost | 94,700,000 |  | 94,700,000 |  | 105,600,000
Internally rated held-to-maturity securities | 6,900,000 |  | 6,900,000 |  | 5,800,000
Held To Maturity Securities Non Rated | 800,000 |  | 800,000 |  |
Held to maturity securities non rated debt maturities year one | 600,000 |  | 600,000 |  |
Held to maturity securities non rated debt maturities year two | 200,000 |  | 200,000 |  |
Maximum [Member] |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |
Securities, 12 months or longer, Unrealized Losses | 133,500,000 |  | 133,500,000 |  | 4,700,000
Available for Sale Securities [Member] |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |
Accrued interest receivable | 2,100,000 |  | 2,100,000 |  | 2,100,000
Held To Maturity Investment Securities [Member] |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |
Accrued interest receivable | 1,000,000.0 |  | 1,000,000.0 |  | 696,000
Held To Maturity Investment Securities [Member] | Total Past Due [Member] |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |
Investment securities, past due | 0 |  | 0 |  | $ 0
Held To Maturity Investment Securities [Member] | Maximum [Member] |  |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |  |
Credit loss expense | $ 1,000 | $ 1,000 | $ 1,000 | $ 2,000 |

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