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Short-term Borrowings | 12 Months Ended
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Dec. 31, 2020
Short-term Debt [Abstract] |
Short-term Borrowings | Short-term Borrowings Short-term borrowings at December 31 were as follows:
| 2020 |  | 2019 |  | 2018
| Ending Balance |  | Average Balance |  | Average Rate |  | Ending Balance |  | Average Balance |  | Average Rate |  | Ending Balance |  | Average Balance |  | Average Rate
| (dollars in thousands)
Federal funds purchased | $ | — |  |  | $ | 4,147 |  |  | 1.06 | % |  | $ | — |  |  | $ | 8,069 |  |  | 2.53 | % |  | $ | 11,000 |  |  | $ | 8,801 |  |  | 2.05 | %
Borrowings from FHLB | — |  |  | 28,252 |  |  | 1.54 |  |  | 136,200 |  |  | 278,930 |  |  | 2.62 |  |  | 565,000 |  |  | 467,594 |  |  | 2.12 |
Securities sold under agreements to repurchase | 117,373 |  |  | 110,235 |  |  | 0.21 |  |  | 65,653 |  |  | 104,548 |  |  | 0.75 |  |  | 145,823 |  |  | 142,562 |  |  | 0.44 |
Total | $ | 117,373 |  |  | $ | 142,634 |  |  | 0.49 |  |  | $ | 201,853 |  |  | $ | 391,547 |  |  | 2.12 |  |  | $ | 721,823 |  |  | $ | 618,957 |  |  | 1.74 |
Maximum total at any month-end | $ | 248,471 |  |  |  |  |  |  | $ | 670,831 |  |  |  |  |  |  | $ | 811,026 |  |  |  |  |
Weighted average rate at year-end |  |  |  |  | 0.10 | % |  |  |  |  |  | 1.41 | % |  |  |  |  |  | 2.17 | %
Interest expense on short-term borrowings for the years ended December 31 is detailed below:
| 2020 |  | 2019 |  | 2018
| (dollars in thousands)
Federal funds purchased | $ | 44 |  |  | $ | 204 |  |  | $ | 180 |
Borrowings from FHLB | 434 |  |  | 7,313 |  |  | 9,929 |
Securities sold under agreements to repurchase | 226 |  |  | 781 |  |  | 632 |
Total interest on short-term borrowings | $ | 704 |  |  | $ | 8,298 |  |  | $ | 10,741 |

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- Definition The entire disclosure for short-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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