| Fiscal period | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
| Period End Date | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 |
| Interest Income:Loans | 587.93 | 533.74 | 328.77 | 297.93 | 309.80 | 330.35 | 295.27 | 247.02 | 224.72 | 212.60 |
| Interest income:Money market loan participations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest income:Short-term investments | 8.55 | 8.33 | 1.44 | 0.25 | 0.41 | 1.52 | 0.70 | 0.44 | 0.24 | 0.13 |
| Interest income:Debt securities | 26.25 | 29.65 | 13.08 | 12.18 | 13.76 | 12.28 | 13.96 | 12.52 | 11.71 | 11.42 |
| Interest income:Marketable equity securities | -- | -- | 1.90 | 1.17 | 2.85 | 3.48 | 3.96 | 3.06 | 2.98 | 2.76 |
| Interest income:Restricted equity securities | 5.79 | 5.57 | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Interest Income | 628.52 | 577.29 | 345.19 | 311.53 | 326.82 | 347.63 | 313.89 | 263.05 | 239.65 | 226.91 |
| Savings accounts | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Money market savings accounts | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NOW accounts | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest Expense:Deposits | 232.96 | 175.67 | 29.59 | 20.71 | 48.43 | 69.62 | 41.98 | 23.29 | 20.07 | 17.48 |
| Interest expense:Brokered deposits | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Certificate of deposit accounts | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest expense:Borrowed funds | 65.97 | 61.91 | 15.82 | 8.44 | 18.23 | 24.71 | 24.22 | 16.58 | 15.91 | 15.07 |
| Interest expense:Subordinated debt | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Interest Expense | 298.94 | 237.58 | 45.42 | 29.16 | 66.65 | 94.33 | 66.19 | 39.87 | 35.98 | 32.55 |
| Net Interest Income | 329.59 | 339.71 | 299.77 | 282.37 | 260.16 | 253.30 | 247.70 | 223.18 | 203.66 | 194.37 |
| Provision for loan losses | 22.00 | 37.87 | 8.63 | (7.84) | 61.89 | 9.58 | 4.95 | 18.99 | 10.35 | 7.45 |
| Provision for investment losses | (0.36) | 0.34 | -- | -- | -- | -- | -- | -- | -- | -- |
| Net interest income after provision for loan losses | 307.94 | 301.50 | 291.14 | 290.21 | 198.28 | 243.72 | 242.75 | 204.19 | 193.31 | 186.91 |
| Loan fees | 2.39 | 2.04 | 2.21 | 2.10 | 2.05 | 2.10 | 1.43 | 1.11 | 1.30 | 1.19 |
| Fees and charges | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Deposit fees | 10.55 | 11.61 | 10.92 | 10.58 | 9.05 | 10.62 | 10.40 | 10.05 | 8.91 | 8.73 |
| Gains on securities, net | -- | 1.70 | 0.32 | (0.04) | 1.97 | 0.51 | 0.23 | 11.39 | -- | -- |
| Swap agreement market valuation credit | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss from pre-payment of FHLB advances | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Net impairment loss on securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Non-credit loss on impairment of securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loss from investments in low income housing | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on sales of loans and leases | 0.95 | 2.58 | 4.14 | 3.74 | -- | -- | -- | -- | -- | -- |
| Gain on sales of loans and leases held-for-sale | -- | -- | -- | -- | 1.12 | 1.71 | 1.88 | 2.64 | 3.26 | 2.21 |
| Equity interest in earnings from other investment | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Other income | 10.06 | 10.11 | 6.52 | 5.94 | 6.19 | 6.59 | 5.85 | 4.79 | 5.24 | 4.66 |
| Gains on sales of building and other real estate owned | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain from termination of pension plan | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Penalty from prepayment of borrowed funds | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on sale/disposals of premises and equipment, net | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Loan level derivative income, net | 1.66 | 3.89 | 4.25 | 4.68 | 4.27 | 8.26 | 5.44 | 2.19 | 3.96 | 3.40 |
| Total Non-Interest Income | 25.62 | 31.93 | 28.35 | 26.99 | 24.64 | 29.79 | 25.22 | 32.17 | 22.67 | 20.18 |
| Salaries, Compensation and employee benefits | 143.72 | 138.90 | 113.49 | 106.79 | 100.99 | 96.55 | 91.54 | 82.41 | 77.84 | 71.27 |
| Advertising and marketing | 5.24 | 4.72 | 4.98 | 4.17 | 4.13 | 4.04 | 4.02 | 3.37 | 3.38 | 3.35 |
| Occupancy | 22.06 | 20.20 | 16.00 | 14.96 | 15.39 | 15.70 | 14.99 | 14.55 | 13.88 | 13.93 |
| FDIC insurance | 8.04 | 7.84 | 3.18 | 2.98 | 4.23 | 1.45 | 2.72 | 3.33 | 3.33 | 3.51 |
| Amortization of identified intangibles | 6.75 | 7.84 | 0.49 | 0.88 | 1.27 | 1.66 | 2.08 | 2.09 | 2.50 | 2.91 |
| Write-down of other real estate owned | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Restructuring charge | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Merger/conversion | 4.20 | 7.41 | 2.25 | -- | -- | 1.13 | 3.79 | 0.41 | -- | -- |
| Other | 17.35 | 18.38 | 13.26 | 9.82 | 12.35 | 13.94 | 13.48 | 11.79 | 10.08 | 11.38 |
| Professional services | 7.13 | 7.23 | 5.06 | 4.69 | 5.16 | 4.37 | 4.40 | 4.32 | 3.85 | 4.19 |
| Equipment and data processing | 27.37 | 27.00 | 20.83 | 18.32 | 17.35 | 18.65 | 18.21 | 16.85 | 15.50 | 14.84 |
| Recognition and retention plans | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Dividend equivalent rights | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Non-Interest expense | 241.87 | 239.52 | 179.54 | 162.61 | 160.84 | 157.48 | 155.23 | 139.11 | 130.36 | 125.38 |
| Income Before Income Taxes | 91.69 | 93.91 | 139.95 | 154.59 | 62.08 | 116.03 | 112.74 | 97.26 | 85.62 | 81.72 |
| Provision for income taxes | 22.98 | 18.92 | 30.21 | 39.15 | 14.44 | 28.27 | 26.19 | 43.64 | 30.39 | 29.35 |
| Retroactive assessment related to REIT | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Current provision:Federal | -- | 0.96 | 17.41 | 25.61 | 22.45 | 21.71 | 23.95 | 27.83 | 22.95 | 23.34 |
| Current provision:State | -- | 1.79 | 8.43 | 8.12 | 7.08 | 6.57 | 7.69 | 5.01 | 5.12 | 4.77 |
| Deferred provision (benefit):Federal | -- | 12.92 | 3.99 | 3.97 | (11.45) | 0.70 | (4.32) | 10.21 | 2.27 | 0.68 |
| Deferred provision (benefit):State | -- | 3.25 | 0.36 | 1.45 | (3.63) | (0.70) | (1.13) | 0.59 | 0.05 | 0.56 |
| Retroactive assessment related to real estate investment trust (“REIT”) | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minority interest in earnings of subsidiary | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Consolidated Net Income (Loss) | 68.72 | 75.00 | 109.74 | 115.44 | 47.64 | 87.76 | 86.55 | 53.62 | 55.22 | 52.37 |
| Net income attributable to noncontrolling interest in subsidiary | -- | -- | -- | -- | 0.00 | 0.04 | 3.49 | 3.10 | 2.86 | 2.59 |
| NET INCOME(LOSS) AVAILABLE TO COMMON SHAREHOLDERS | 68.72 | 75.00 | 109.74 | 115.44 | 47.64 | 87.72 | 83.06 | 50.52 | 52.36 | 49.78 |
| Earnings Per Common Share:Basic | 0.77 | 0.85 | 1.42 | 1.48 | 0.60 | 1.10 | 1.04 | 0.68 | 0.74 | 0.71 |
| Earnings Per Common Share:Diluted | 0.77 | 0.85 | 1.42 | 1.48 | 0.60 | 1.10 | 1.04 | 0.68 | 0.74 | 0.71 |
| Weighted average common shares outstanding during the period:Basic | 88.98 | 88.23 | 77.08 | 77.97 | 78.95 | 79.68 | 79.67 | 74.46 | 70.26 | 70.10 |
| Weighted average common shares outstanding during the period:Diluted | 89.30 | 88.45 | 77.35 | 78.24 | 79.10 | 79.86 | 79.91 | 74.81 | 70.44 | 70.24 |