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Borrowings (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Jul. 26, 2016 | Aug. 05, 2014
Short-term Debt [Line Items] |  |  |  |
Total short-term borrowings | $ 326,726 | $ 280,980 |  |
Average daily balance short-term borrowings | 309,471 | 165,723 |  |
Maximum month-end balance short-term borrowings | 332,987 | 474,852 |  |
Total long-term borrowings | 268,077 | 217,687 |  |
Subordinated Notes |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Total long-term borrowings | 220,000 | 220,000 |  |
Average daily balance long-term borrowings | 220,000 | 220,000 |  |
Maximum month-end balance long-term borrowings | $ 220,000 | $ 220,000 |  |
Interest rate, stated percentage | 5.42% | 5.42% | 5.00% | 5.75%
Average interest rate | 5.42% | 5.42% |  |
Month-end interest rate | 5.42% | 5.42% |  |
Borrowings |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Total long-term borrowings | $ 50,000 | $ 0 |  |
Average daily balance long-term borrowings | 50,000 | 0 |  |
Maximum month-end balance long-term borrowings | $ 50,000 | $ 0 |  |
Interest rate, stated percentage | 1.81% | 0.00% |  |
Average interest rate | 1.81% | 0.00% |  |
Month-end interest rate | 1.81% | 0.00% |  |
Customer repurchase agreements and federal funds purchased |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Total short-term borrowings | $ 26,726 | $ 30,980 |  |
Average daily balance short-term borrowings | 29,345 | 30,024 |  |
Maximum month-end balance short-term borrowings | $ 32,987 | $ 34,852 |  |
Interest rate, stated percentage | 0.26% | 1.18% |  |
Average interest rate | 1.00% | 1.15% |  |
Month-end interest rate | 1.13% | 0.89% |  |
Federal Home Loan Bank – current portion |  |  |  |
Short-term Debt [Line Items] |  |  |  |
Total short-term borrowings | $ 300,000 | $ 250,000 |  |
Average daily balance short-term borrowings | 280,126 | 135,699 |  |
Maximum month-end balance short-term borrowings | $ 300,000 | $ 440,000 |  |
Interest rate, stated percentage | 0.67% | 0.39% |  |
Average interest rate | 0.66% | 1.67% |  |
Month-end interest rate | 0.67% | 0.92% |  |

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