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Borrowings (Tables) | 9 Months Ended
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Sep. 30, 2021
Borrowings |
Schedule of distribution of securities sold under agreements to repurchase and short-term borrowings and weighted average interest rates | Securities sold under agreements to repurchase were as follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of | ​
​ | ​ | September 30, | ​ | December 31, | ​
​ |  | 2021 |  | 2020 |
Securities sold under agreements to repurchase | ​ | $ | 241,242 | ​ | $ | 175,614 | ​
Weighted average rate for securities sold under agreements to repurchase | ​ | ​ | 0.08 | % | ​ | 0.13 | %
Summary of long-term debt | Short-term borrowings are summarized as follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of
​ | ​ | September 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Short-term borrowings | ​ | ​ | ​ | ​ | ​ | ​
FHLB advances maturing in less than one year from date of origination, and the current portion of long-term FHLB advances due within 12 months | ​ | $ | 5,673 | ​ | $ | 4,658
Term Loan, current portion due within 12 months | ​ | ​ | 12,000 | ​ | ​ | —
Total short-term debt | ​ | $ | 17,673 | ​ | $ | 4,658
​ Federal funds purchased are short-term borrowings that generally mature between one and 90 days. The Company had no federal funds purchased as of September 30, 2021 or December 31, 2020. ​ Long-term debt is summarized as follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of
​ | ​ | September 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Long-term debt | ​ | ​ | ​ | ​ | ​ | ​
Notes payable, FHLB, original maturity of 5 years, collateralized by FHLB deposits, residential and commercial real estate loans and FHLB stock | ​ | $ | 4,233 | ​ | $ | 4,757
Term Loan | ​ | ​ | 45,000 | ​ | ​ | —
Total long-term debt | ​ | $ | 49,233 | ​ | $ | 4,757
Schedule of unamortized debt issuance cost | Unamortized debt issuance costs related to senior notes and subordinated notes are presented in the following table (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of
​ | ​ | September 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Unamortized debt issuance costs | ​ | ​ | ​ | ​ | ​ | ​
Senior notes issued in 2017 | ​ | $ | 90 | ​ | $ | 191
Subordinated notes issued in 2017 | ​ | ​ | 575 | ​ | ​ | 651
Subordinated notes issued in 2020 | ​ | ​ | 1,788 | ​ | ​ | 2,123
Total unamortized debt issuance costs | ​ | $ | 2,453 | ​ | $ | 2,965

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