| Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis |
Financial assets and financial liabilities measured at fair value on a recurring basis are as follows: | | | | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at Reporting Date Using | | As of June 30, 2025 | Fair Value | Quoted Prices in
Active Markets for
Identical Assets
(Level 1) | Significant Other
Observable
Inputs
(Level 2) | Significant
Unobservable
Inputs
(Level 3) | | Investment debt securities available-for-sale: | | | | | | | | U.S. Treasury notes | $ | 233.9 | | $ | — | $ | 233.9 | | $ | — | | State, county, and municipal securities | 213.4 | | | — | 213.4 | | | — | | Obligations of U.S. government agencies | 206.7 | | | — | 206.7 | | | — | | U.S. agency commercial mortgage-backed securities | 947.1 | | | — | 947.1 | | | — | | U.S. agency residential mortgage-backed securities | 1,111.4 | | | — | 1,111.4 | | | — | | U.S. agency collateralized mortgage obligations | 993.6 | | | — | 993.6 | | | — | | Private mortgage-backed securities | 182.3 | | | — | 182.3 | | | — | | Collateralized loan obligations | 626.8 | | | — | 626.8 | | | — | | Corporate securities | 227.0 | | | — | 227.0 | | | — | | | | | | | | | Loans held for sale | 4.2 | | | — | 4.2 | | | — | | Derivative assets: | | | | | | | | | | | | | | | Interest rate swap contracts | 29.1 | | | — | 29.1 | | | — | | | | | | | | | | | | | | | | Derivative liabilities: | | | | | | | | Interest rate collars | 0.3 | | | — | 0.3 | | | — | | Interest rate swap contracts | 88.6 | | | — | 88.6 | | | — | | | | | | | | | | | | | | | | | | | | | | | Deferred compensation plan assets | 21.5 | | | 21.5 | — | | | — |
| | | | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at Reporting Date Using | | As of December 31, 2024 | Fair Value | Quoted Prices in
Active Markets for
Identical Assets
(Level 1) | Significant Other
Observable
Inputs
(Level 2) | Significant
Unobservable
Inputs
(Level 3) | | Investment debt securities available-for-sale: | | | | | | | | U.S. Treasury notes | $ | 226.9 | | $ | — | $ | 226.9 | | $ | — | | State, county and municipal securities | 212.0 | | | — | 212.0 | | | — | | Obligations of U.S. government agencies | 213.3 | | | — | 213.3 | | | — | | U.S. agency commercial mortgage-backed securities | 982.8 | | | — | 982.8 | | | — | | U.S. agency residential mortgage-backed securities | 1,175.8 | | | — | 1,175.8 | | | — | | U.S. agency collateralized mortgage obligations | 1,050.9 | | | — | 1,050.9 | | | — | | Private mortgage-backed securities | 190.5 | | | — | 190.5 | | | — | | Collateralized loan obligations | 772.0 | | | — | 772.0 | | | — | | Corporate securities | 232.9 | | | — | 232.9 | | | — | | | | | | | | | Loans held for sale | 0.9 | | | — | 0.9 | | | — | | Derivative assets: | | | | | | | | Interest rate swap contracts | 44.9 | | | — | 44.9 | | | — | | | | | | | | | | | | | | | | Derivative liabilities | | | | | | | | Interest rate collars | 1.0 | | | — | 1.0 | | | — | | Interest rate swap contracts | 132.8 | | | — | 132.8 | | | — | | | | | | | | | | | | | | | | Deferred compensation plan assets | 22.7 | | | 22.7 | — | | | — |
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| Fair Value Inputs, Assets, Quantitative Information |
The following table presents additional quantitative information about assets measured at fair value on a non-recurring basis and for which the Company has utilized Level 3 inputs to determine fair values: | | | | | | | | | | | | | | | | | | | | | | | | As of June 30, 2025 | Fair Value | Valuation
Technique | Unobservable Inputs | Range
(Weighted Average) | | Collateral-dependent loans | $ | 32.8 | | Appraisal | Appraisal adjustment | 2% | - | 100% | (32%) | | Loans held for sale | 331.0 | | Fair value of collateral | Discount for type of property, age of appraisal, and current status | —% | - | 7% | (2)% | | | | | | | | | | Long-lived assets to be disposed of by sale | 1.9 | | Appraisal | Appraisal adjustment | —% | - | —% | —% | | | | | | | | | As of December 31, 2024 | | | | | | Collateral-dependent loans | $ | 97.6 | | Appraisal | Appraisal adjustment | —% | - | 87% | (40%) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| Fair Value, by Balance Sheet Grouping |
The estimated fair values of financial instruments that are reported in the Company’s consolidated balance sheets, and are segregated by the level of the valuation inputs within the fair value hierarchy that are utilized to measure fair value, are as follows: | | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at Reporting Date Using | | As of June 30, 2025 | Carrying Amount | Estimated
Fair Value | Quoted Prices in Active Markets for
Identical Assets
(Level 1) | Significant Other
Observable
Inputs
(Level 2) | Significant
Unobservable
Inputs
(Level 3) | | Financial assets: | | | | | | | Cash and cash equivalents | $ | 1,090.2 | | $ | 1,090.2 | | $ | 1,090.2 | | $ | — | | $ | — | | | Investment debt securities held-to-maturity | 2,570.0 | | 2,317.0 | | — | | 2,317.0 | | — | | | Accrued interest receivable | 105.7 | | 105.7 | | — | | 105.7 | | — | | | Mortgage servicing rights, net | 24.4 | | 35.7 | | — | | 35.7 | | — | | | Net loans held for investment | 16,143.8 | | 15,750.4 | | — | | — | | 15,750.4 | | | Total financial assets | $ | 19,934.1 | | $ | 19,299.0 | | $ | 1,090.2 | | $ | 2,458.4 | | $ | 15,750.4 | | | | | | | | | Financial liabilities: | | | | | | | Total deposits, excluding time deposits | $ | 19,834.0 | | $ | 19,834.0 | | $ | 19,834.0 | | $ | — | | $ | — | | | Time deposits | 2,796.6 | | 2,782.0 | | — | | 2,782.0 | | — | | | Securities sold under repurchase agreements | 509.3 | | 509.3 | | — | | 509.3 | | — | | | Other borrowed funds | 250.0 | | 250.0 | | — | | 250.0 | | — | | | Accrued interest payable | 41.3 | | 41.3 | | — | | 41.3 | | — | | | Long-term debt | 252.0 | | 256.7 | | — | | 256.7 | | — | | | Subordinated debentures held by subsidiary trusts | 163.1 | | 149.5 | | — | | 149.5 | | — | | | Total financial liabilities | $ | 23,846.3 | | $ | 23,822.8 | | $ | 19,834.0 | | $ | 3,988.8 | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at Reporting Date Using | | As of December 31, 2024 | Carrying Amount | Estimated
Fair Value | Quoted Prices in Active Markets for
Identical Assets
(Level 1) | Significant Other
Observable
Inputs
(Level 2) | Significant
Unobservable
Inputs
(Level 3) | | Financial assets: | | | | | | | Cash and cash equivalents | $ | 896.6 | | $ | 896.6 | | $ | 896.6 | | $ | — | | $ | — | | | Investment debt securities held-to-maturity | 2,687.5 | | 2,358.6 | | — | | 2,358.6 | | — | | | Accrued interest receivable | 116.8 | | 116.8 | | — | | 116.8 | | — | | | Mortgage servicing rights, net | 25.7 | | 35.4 | | — | | 35.4 | | — | | | Net loans held for investment | 17,640.8 | | 17,154.7 | | — | | — | | 17,154.7 | | | Total financial assets | $ | 21,367.4 | | $ | 20,562.1 | | $ | 896.6 | | $ | 2,510.8 | | $ | 17,154.7 | | | | | | | | | Financial liabilities: | | | | | | | Total deposits, excluding time deposits | $ | 20,125.1 | | $ | 20,125.1 | | $ | 20,125.1 | | $ | — | | $ | — | | | Time deposits | 2,890.5 | | 2,875.5 | | — | | 2,875.5 | | — | | | Securities sold under repurchase agreements | 523.9 | | 523.9 | | — | | 523.9 | | — | | | Other borrowed funds | 1,567.5 | | 1,567.5 | | — | | 1,567.5 | | — | | | Accrued interest payable | 47.0 | | 47.0 | | — | | 47.0 | | — | | | Long-term debt | 132.2 | | 131.9 | | — | | 131.9 | | — | | | Subordinated debentures held by subsidiary trusts | 163.1 | | 152.3 | | — | | 152.3 | | — | | | Total financial liabilities | $ | 25,449.3 | | $ | 25,423.2 | | $ | 20,125.1 | | $ | 5,298.1 | | $ | — | |
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