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Securities (Held-to-Maturity Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule of Held-to-maturity Securities |  |
Amortized cost | $ 38,873 | $ 38,612
Gross unrecognized holding gains | 471 | 87
Gross unrecognized holding losses | (70) | (179)
Estimated Fair Value | 39,274 | 38,520
U.S. Government agency obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 1,498 | 1,497
Gross unrecognized holding gains | 0 | 2
Gross unrecognized holding losses | (5) | (5)
Estimated Fair Value | 1,493 | 1,494
Municipal obligations |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 21,928 | 21,173
Gross unrecognized holding gains | 443 | 62
Gross unrecognized holding losses | (14) | (78)
Estimated Fair Value | 22,357 | 21,157
Collateralized mortgage obligations - government issued |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 9,601 | 9,148
Gross unrecognized holding gains | 16 | 17
Gross unrecognized holding losses | (33) | (38)
Estimated Fair Value | 9,584 | 9,127
Collateralized mortgage obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities |  |
Amortized cost | 5,846 | 6,794
Gross unrecognized holding gains | 12 | 6
Gross unrecognized holding losses | (18) | (58)
Estimated Fair Value | $ 5,840 | $ 6,742

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- Definition Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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