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Securities (Held-to-Maturity Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Held-to-maturity Securities |  |
Amortized cost | $ 39,950 | $ 37,778
Gross unrecognized holding gains | 20 | 177
Gross unrecognized holding losses | (840) | (259)
Estimated Fair Value | 39,130 | 37,696
U.S. government agency obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 1,500 | 1,499
Gross unrecognized holding gains | 0 | 0
Gross unrecognized holding losses | (3) | (9)
Estimated Fair Value | 1,497 | 1,490
Municipal obligations |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 21,135 | 21,680
Gross unrecognized holding gains | 20 | 176
Gross unrecognized holding losses | (229) | (34)
Estimated Fair Value | 20,926 | 21,822
Collateralized mortgage obligations - government issued |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 7,749 | 9,072
Gross unrecognized holding gains | 0 | 1
Gross unrecognized holding losses | (301) | (130)
Estimated Fair Value | 7,448 | 8,943
Collateralized mortgage obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 9,566 | 5,527
Gross unrecognized holding gains | 0 | 0
Gross unrecognized holding losses | (307) | (86)
Estimated Fair Value | $ 9,259 | $ 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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