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Investment securities - Additional Information (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 USD ($) shares | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) security shares | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Other-than-temporary impairments recognized |  |  | $ 0 |  |
Value of common stock | $ 14,407 |  | $ 14,407 |  | $ 14,431
Visa Class A stock |  |  |  |  |
Conversion ratio of common stock |  |  | 1.6228 |  |
Visa Class B stock |  |  |  |  |
Shares held | shares | 44,982 |  | 44,982 |  |
Value of common stock | $ 0 |  | $ 0 |  | 0
Federal Home Loan Bank of Pittsburgh (FHLB) |  |  |  |  |
Value of common stock | 3,083 |  | 3,083 |  | 5,355
Atlantic Community Bankers Bank (ACBB) |  |  |  |  |
Value of common stock | 42 |  | 42 |  | $ 42
U.S. government-sponsored enterprises state and municipals |  |  |  |  |
Other-than-temporary impairments recognized | $ 0 | $ 0 | $ 0 | $ 0 |
Mortgage-backed Securities, U.S. government-sponsored enterprises |  |  |  |  |
Number of securities in continuous unrealized loss position | security |  |  | 14 |  |
Number of securities in continuous unrealized loss positions 12 months or longer | security |  |  | 2 |  |
State and Municipals, Taxable |  |  |  |  |
Number of securities in continuous unrealized loss position | security |  |  | 25 |  |
State and Municipals, Taxable | Corporate Bonds |  |  |  |  |
Number of securities in continuous unrealized loss position | security |  |  | 5 |  |
State and Municipals, Tax-exempt |  |  |  |  |
Number of securities in continuous unrealized loss position | security |  |  | 44 |  |

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