| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| INTEREST AND DIVIDEND INCOME | | | | | | | | |
| Loans | 217.6 | 214.7 | 227.3 | 226.7 | 214.4 | 191.4 | 169.6 | 154.6 |
| Due from banks | 0.4 | 0.3 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Available-for-sale debt securities | | | | | | | | |
| Held-to-maturity securities | | | | | | | | |
| Federal Home Loan Bank and other stock | | | | | | | | |
| Interest income | 251.3 | 241.3 | 254.3 | 261.4 | 251.6 | 226.8 | 202.7 | 188.7 |
| |
| INTEREST EXPENSE | | | | | | | | |
| Time certificates of deposits of $250,000 or more | 2.3 | 2.2 | 3.2 | | | | | |
| Federal funds purchased and securities sold under agreements to repurchase | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 2.2 | 2.7 |
| Total Interest Expense | 21.0 | 17.5 | 29.0 | 50.8 | 39.8 | 25.5 | 22.1 | 20.4 |
| Net Interest Income | 230.3 | 223.8 | 225.3 | 210.6 | 211.8 | 201.3 | 180.6 | 168.4 |
| |
| Less: Provision for credit loss expense | | | | | | | | |
| Net Interest Income After Credit for Credit Loss Expense | 227.5 | 226.0 | 208.1 | 209.3 | 207.9 | 197.1 | 176.3 | 165.4 |
| |
| NONINTEREST INCOME | | | | | | | | |
| Insurance commissions and fees | 36.2 | 34.8 | 31.5 | 31.1 | 29.4 | 28.8 | 29.5 | 29.3 |
| Service charges on deposit accounts | 7.4 | 6.3 | 6.3 | 8.3 | 8.4 | 8.4 | 8.8 | 9.3 |
| Card services income | 11.0 | 10.8 | 9.3 | | | | | |
| Other income | 5.9 | 7.2 | 8.8 | 8.4 | 13.1 | 7.6 | 6.3 | 8.9 |
| Total Noninterest Income | 78.0 | 78.8 | 73.9 | 75.4 | 77.4 | 69.2 | 68.8 | 71.9 |
| |
| NONINTEREST EXPENSE | | | | | | | | |
| Salaries and wages | 98.3 | 96.0 | 92.5 | 89.4 | 85.6 | 81.9 | 77.4 | 72.7 |
| |
| Other employee benefits | | | | | | | | |
| Net occupancy expense of premises | 13.1 | 13.2 | 12.9 | 13.2 | 13.3 | 13.2 | 12.5 | 12.3 |
| Furniture and fixture expense | 8.1 | 8.3 | 7.8 | 7.8 | 7.4 | 7.0 | 6.5 | 6.1 |
| Amortization of intangible assets | 0.9 | 1.3 | 1.5 | 1.7 | 1.8 | 1.9 | 2.1 | 2.0 |
| Other operating expense | 50.5 | 47.3 | 44.7 | 46.2 | 50.9 | 45.5 | 37.2 | 37.7 |
| Total Noninterest Expenses | 195.8 | 190.3 | 184.3 | 181.8 | 181.1 | 171.1 | 158.6 | 149.9 |
| Income Before Income Tax Expense | 109.7 | 114.6 | 97.7 | 102.9 | | | | 87.5 |
| Income Tax Expense | 24.6 | 25.2 | 19.9 | 21.0 | 21.8 | 42.6 | 27.0 | 29.0 |
| Net Income Attributable to Noncontrolling Interests and Tompkins Financial Corporation | 85.2 | 89.4 | 77.7 | 81.8 | 82.4 | 52.6 | 59.5 | 58.6 |
| Less: Net Income Attributable to Noncontrolling Interests | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Net Income Attributable to Tompkins Financial Corporation | 85.0 | 89.3 | 77.6 | 81.7 | 82.3 | 52.5 | 59.3 | 58.4 |
| |
| Basic Earnings Per Share (in dollars per share) | $5.92 | $6.08 | $5.22 | $5.39 | $5.39 | $3.46 | $3.94 | $3.91 |
| Diluted Earnings Per Share (in dollars per share) | $5.89 | $6.05 | $5.20 | $5.37 | $5.35 | $3.43 | $3.91 | $3.87 |