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Securities - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |
Realized gain on available for sale debt securities | $ 172,000 |  | $ 297,000 |
Realized gains on available-for-sale securities |  | $ 0 |  | $ 0
Realized losses on available for sale debt securities |  |  | 3,000 | $ 0
Realized losses on available-for-sale securities | 3,000,000 | $ 0 |  |
Realized loss on equity securities | 20,000,000 |  | 20,000,000 |
Federal Home Loan Bank New York (FHLBNY) |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, amount of advances | 41,400,000 |  | 41,400,000 |
Federal Home Loan Bank Pittsburgh (FHLBPITT) |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, amount of advances | 17,300,000 |  | 17,300,000 |
Atlantic Central Bankers Bank (ACBB) |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |  |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, amount of advances | $ 95,000 |  | $ 95,000 |

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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 + Details
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- Definition Amount of advances from the Federal Home Loan Bank (FHLB). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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