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Short-term borrowings (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Short-term Debt |  |  |
Ending Balance |  | $ 50,000 |
FHLB Advances |  |  |
Short-term Debt |  |  |
Ending Balance |  | 50,000 | $ 152,150
Average Balance | $ 13,973 | 83,716 | 62,941
Maximum Month-End Balance | $ 50,000 | $ 179,199 | $ 152,150
Weighted Average Rate for the Year | 0.56% | 1.01% | 2.61%
Weighted Average Rate at End of Year |  | 0.40% | 1.84%

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- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph (a) Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1402 -Paragraph (b) -Subparagraph (1) + Details
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