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Securities Securities (Held-to-Maturity Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 37,731 | $ 37,778
Gross unrealized gains | 74 | 177
Gross unrealized losses | (396) | (259)
Fair value | 37,409 | 37,696
U.S. government agency securities - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost |  | 1,499
Gross unrealized gains |  | 0
Gross unrealized losses |  | (9)
Fair value |  | 1,490
Municipal securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 21,066 | 21,680
Gross unrealized gains | 72 | 176
Gross unrealized losses | (59) | (34)
Fair value | 21,079 | 21,822
Mortgage backed securities - government issued |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 7,358 | 9,072
Gross unrealized gains | 0 | 1
Gross unrealized losses | (172) | (130)
Fair value | 7,186 | 8,943
Mortgage backed securities - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 9,307 | 5,527
Gross unrealized gains | 2 | 0
Gross unrealized losses | (165) | (86)
Fair value | $ 9,144 | $ 5,441

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- Definition Amount of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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