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Borrowings (Tables) | 6 Months Ended
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Jun. 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 | ​
​ | ​ | June 30, | ​ | December 31, | ​
​ |  | 2021 |  | 2020 |
Securities sold under agreements to repurchase | ​ | $ | 207,266 | ​ | $ | 175,614 | ​
Weighted average rate for securities sold under agreements to repurchase | ​ | ​ | 0.12 | % | ​ | 0.13 | %
Summary of long-term debt | Short-term borrowings are summarized as follows (dollars in thousands). ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of
​ | ​ | June 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 | ​ | $ | 5,668 | ​ | $ | 4,658
Revolving line of credit | ​ | ​ | 12,500 | ​ | ​ | —
Term Loan, current portion due within 12 months | ​ | ​ | 12,000 | ​ | ​ | —
Total short-term debt | ​ | $ | 30,168 | ​ | $ | 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 June 30, 2021, or December 31, 2020. ​ Long-term debt is summarized as follows (dollars in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of
​ | ​ | June 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 | ​ | $ | 4,409 | ​ | $ | 4,757
Term Loan | ​ | ​ | 48,000 | ​ | ​ | —
Total long-term debt | ​ | $ | 52,409 | ​ | $ | 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
​ | ​ | June 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Unamortized debt issuance costs | ​ | ​ | ​ | ​ | ​ | ​
Senior notes issued in 2017 | ​ | $ | 124 | ​ | $ | 191
Subordinated notes issued in 2017 | ​ | ​ | 600 | ​ | ​ | 651
Subordinated notes issued in 2020 | ​ | ​ | 1,897 | ​ | ​ | 2,123
Total unamortized debt issuance costs | ​ | $ | 2,621 | ​ | $ | 2,965

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