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FEDERAL HOME LOAN BANK ADVANCES (Tables) | 12 Months Ended
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Dec. 31, 2020
FEDERAL HOME LOAN BANK ADVANCES. |
Schedule of FHLB advances | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
(Dollars in thousands) |  | 2020 |  | 2019 |
Average daily balance during the year | ​ | $ | 284,719 | ​ | $ | 245,283 | ​
Average interest rate during the year | ​ |  | 1.40 | % |  | 1.86 | %
Maximum month-end balance during the year | ​ | $ | 340,000 | ​ | $ | 435,000 | ​
Weighted average interest rate at year-end | ​ |  | 0.35 | % |  | 1.82 | %
Schedule of contractual maturities and weighted average interest rates of FHLB advances | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020 |
(Dollars in thousands) | ​ | ​ | ​ | ​ | Weighted |
Contractual Maturity |  | Amount |  | Average Rate |
Overnight | ​ | $ | — | ​ | — | %
​ | ​ | ​ | ​ | ​ | ​ | ​
2021 | ​ |  | 215,000 |  | 0.35 | ​
Total FHLB advances | ​ | $ | 215,000 |  | 0.35 | %
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019 |
(Dollars in thousands) | ​ | ​ | ​ | ​ | Weighted |
Contractual Maturity |  | Amount |  | Average Rate |
Overnight | ​ | $ | 195,000 | ​ | 1.81 | %
​ | ​ | ​ | ​ | ​ | ​ | ​
2020 | ​ |  | 240,000 |  | 1.84 | ​
Total FHLB advances | ​ | $ | 435,000 |  | 1.82 | %

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