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Federal funds purchased and securities sold under agreements to repurchase - Federal Funds and Repurchase Agreements (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Federal funds purchased and securities sold under agreements to repurchase |  |
Year End Weighted Rate (as a percent) | 0.00% | 0.00%
Average Weighted Rate (as a percent) | 0.00% | 0.00%
Average Balance Outstanding | $ 22,527 | $ 39,564
Maximum Outstanding at any Month End | 29,222 | 74,910
Balance | $ 27,272 | $ 24,647
Federal funds purchased |  |
Federal funds purchased and securities sold under agreements to repurchase |  |
Year End Weighted Rate (as a percent) | 2.00% | 2.64%
Average Weighted Rate (as a percent) | 2.65% | 2.29%
Average Balance Outstanding | $ 329 | $ 1,242
Maximum Outstanding at any Month End | 1,950 | 12,863
Balance | $ 0 | $ 8,000
Short-term repurchase agreements |  |
Federal funds purchased and securities sold under agreements to repurchase |  |
Year End Weighted Rate (as a percent) |  | 0.00%
Average Weighted Rate (as a percent) |  | 3.51%
Average Balance Outstanding |  | $ 11,180
Maximum Outstanding at any Month End |  | 25,944
Balance |  | $ 0
Bank | Short-term repurchase agreements |  |
Federal funds purchased and securities sold under agreements to repurchase |  |
Year End Weighted Rate (as a percent) | 0.45% | 0.35%
Average Weighted Rate (as a percent) | 0.45% | 0.67%
Average Balance Outstanding | $ 22,198 | $ 27,142
Maximum Outstanding at any Month End | 27,272 | 36,103
Balance | $ 27,272 | $ 16,647

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