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Securities - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |  |
Debt securities, held-to-maturity, amortized cost | $ 269,268,000 |  | $ 269,268,000 |  | $ 0
Realized gains on available-for-sale debt securities | 797,000 | $ 0 | 1,100,000 | $ 178,000 |
Realized losses on available-for-sale debt securities | 851,000 | 0 | 851,000 | 0 |
Proceeds from sales of available-for-sale debt securities | 103,800,000 | 0 | 142,679,000 | 42,333,000 |
Realized gains on called available-for-sale debt securities | 0 | 0 | 0 | 251,000 |
Realized gains (losses) on equity securities, net | (6,000) | $ (2,000) | (18,000) | $ 17,000 |
Unrealized Losses | 2,099,000 |  | 2,099,000 |  | 0
Held-to-maturity debt securities | 269,268,000 |  | 269,268,000 |  | $ 0
Federal Home Loan Bank New York (FHLBNY) |  |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |  |
Holdings of FHLBNY, FHLBPITT and ACBB stock, amount of advances | 9,300,000 |  | 9,300,000 |  |
Federal Home Loan Bank Pittsburgh (FHLBPITT) |  |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |  |
Holdings of FHLBNY, FHLBPITT and ACBB stock, amount of advances | 1,000,000 |  | 1,000,000 |  |
Atlantic Central Bankers Bank (ACBB) |  |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |  |
Holdings of FHLBNY, FHLBPITT and ACBB stock, amount of advances | $ 95,000 |  | $ 95,000 |  |

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