| Dec 31,
2010 | Dec 31,
2011 | Dec 31,
2012 | Dec 31,
2013 | Dec 31,
2014 | Dec 31,
2015 | Dec 31,
2016 | Dec 31,
2017 | Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2023 |
|---|
| Net income | 57 | 58 | 55 | 62 | 75 | 76 | 78 | 82 | 113 | 121 | 104 | 155 | 119 |
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| Provision | - | - | - | - | - | - | - | - | - | - | 51 | -8 | 25 |
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| Depreciation and amortization of premises and equipment | - | 5 | 6 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 10 | - | 11 |
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| Net amortization on securities | 1 | -2 | -2 | -5 | -3 | -3 | -5 | -5 | -4 | -3 | -4 | - | -3 |
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| Amortization of intangible assets | 3 | 3 | 3 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 5 |
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| Amortization of operating lease right-of-use assets | - | - | - | - | - | - | - | - | - | - | - | - | 7 |
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| Amount of cash outflow for tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. | - | - | - | - | - | - | - | - | - | - | - | - | 0 |
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| Stock-based compensation expense | 4 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | - | 5 |
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| Bank owned life insurance income | 3 | 3 | 3 | 4 | 5 | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 7 |
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| Amortization of subordinated debt issuance costs | - | - | - | - | - | - | - | - | - | - | 0 | - | 0 |
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| Proceeds from sale of loans held for sale | 83 | 14 | 65 | 71 | 7 | 72 | 97 | 111 | 103 | 176 | 169 | - | 54 |
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| Originations of loans held for sale | - | - | - | - | - | - | - | - | - | 181 | 158 | - | 56 |
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| Net gain on sale of loans held for sale | -1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | - | 0 |
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| Net security losses (gains) | - | - | - | - | - | - | - | - | -6 | 4 | -0 | 1 | -9 |
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| Net (gains) losses on sale of other real estate owned | -1 | 3 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | -0 | 0 | - | 0 |
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| The charge against earnings resulting from the write down of a minority interest equity investment during the period. | - | - | - | - | - | - | - | - | - | - | - | - | 5 |
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| Net deferred income tax expense (benefit) | -15 | -9 | -0 | 2 | 8 | - | - | - | - | -2 | -17 | 1 | 6 |
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| Net change in other assets and other liabilities | - | - | - | - | - | - | - | - | - | 5 | 50 | - | 28 |
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| Net cash provided by operating activities | 89 | 84 | 89 | 119 | - | - | - | 137 | 148 | 153 | 142 | - | 157 |
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| Net cash provided by (used in) acquisitions | - | - | - | - | - | - | 2 | 4 | 8 | - | 4 | - | -45 |
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| Proceeds from maturities, calls and principal paydowns | 511 | 542 | 574 | 377 | 236 | 299 | 325 | 291 | 259 | 274 | 336 | - | 116 |
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| Proceeds from sales | - | - | - | - | - | - | - | - | 101 | 26 | - | - | 125 |
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| Purchases | - | - | - | - | - | - | - | - | 132 | 253 | 690 | - | - |
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| Proceeds from maturities, calls and principal paydowns | 112 | 47 | 32 | 34 | 45 | 79 | 101 | 104 | 101 | 224 | 243 | - | 101 |
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| Purchases | 49 | 21 | 20 | 85 | 49 | 95 | 157 | 61 | 401 | 71 | 231 | - | 88 |
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| The cash inflow associated with the calls of equity securities. | - | - | - | - | - | - | - | - | - | - | 2 | - | - |
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| The cash outflow associated with the purchase of equity securities. | - | - | - | - | - | - | - | - | 0 | 0 | - | - | 0 |
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| Net increase in loans | -7 | 173 | 278 | 255 | 212 | 315 | 344 | 419 | 331 | 273 | 379 | - | 338 |
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| Proceeds from Federal Home Loan Bank stock redemption | - | - | - | - | 78 | 61 | 159 | 249 | 247 | 183 | 63 | - | 92 |
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| Amount of cash outflow to acquire Federal Reserve Bank (FRB) stock and Federal Home Loan Bank (FHLB) stock. | - | - | - | - | - | - | - | - | - | 174 | 46 | - | 91 |
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| Proceeds from settlement of bank owned life insurance | 3 | 1 | - | - | 6 | 2 | 1 | 1 | - | 1 | 1 | - | 4 |
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| Purchases of bank owned life insurance | - | - | - | - | - | - | 47 | - | - | - | - | - | - |
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| Purchases of premises and equipment, net | 7 | 10 | 7 | 6 | 9 | 8 | 3 | 7 | 7 | 7 | 8 | - | 9 |
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| Proceeds from sales of other real estate owned | 3 | 3 | 4 | 5 | 4 | 4 | 7 | 7 | 4 | 2 | 1 | - | 0 |
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| Net cash (used in) provided by investing activities | 58 | -175 | -127 | -184 | - | - | - | -305 | -418 | -64 | -710 | - | -44 |
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| Net increase (decrease) in deposits | 41 | 88 | 135 | -8 | 409 | 305 | 369 | 197 | 198 | 220 | 1,494 | - | 164 |
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| Net (decrease) increase in short-term borrowings | 3 | 22 | -19 | 271 | -139 | 126 | 239 | 37 | 153 | -216 | -487 | - | -232 |
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| Proceeds from long-term debt | - | - | - | - | - | - | - | - | - | - | - | - | 25 |
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| Repayments of long-term debt | - | - | - | - | - | - | - | - | - | - | 25 | - | 0 |
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| Proceeds from the issuance of shares to employee and other stock plans | - | - | - | - | - | - | - | 3 | 1 | 1 | 0 | - | 0 |
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| Cash paid by employer for tax-withholding on stock issuance | - | - | - | - | - | - | - | 4 | 2 | 2 | 2 | - | 2 |
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| Purchase of treasury stock | - | 31 | 15 | 12 | 0 | 27 | 17 | - | - | - | 8 | - | 5 |
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| Cash dividends | 28 | 27 | 27 | 34 | 37 | 38 | 39 | 40 | 43 | 46 | 47 | - | 56 |
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| Net cash (used in) provided by financing activities | -166 | 52 | 72 | 60 | - | - | - | 179 | 291 | -53 | 1,023 | - | -105 |
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| Net increase (decrease) in cash and cash equivalents | - | - | - | - | - | - | - | - | - | 36 | 456 | - | 8 |
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| Interest expense | - | - | - | - | - | - | - | 26 | 37 | 56 | 32 | - | 130 |
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| Income taxes paid, net of refund | - | - | - | - | - | - | - | 34 | 32 | 28 | 46 | - | 28 |
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| Loans transferred to other real estate owned | - | - | - | 5 | 4 | 3 | 7 | 6 | 1 | 1 | 1 | - | 0 |
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| Fair value of assets acquired, excluding acquired cash and goodwill | - | 67 | 258 | 1,505 | - | 4 | 3 | 3 | 6 | - | 3 | - | 1,416 |
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| Fair value of liabilities assumed | - | - | - | - | - | - | - | - | - | - | - | - | 1,380 |
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| Common stock issued | - | - | - | - | - | - | - | - | - | - | - | - | 162 |
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