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Securities Securities (Held-to-Maturity Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 38,612 | $ 37,282
Gross unrealized gains | 87 | 377
Gross unrealized losses | (179) | (101)
Fair value | 38,520 | 37,558
U.S. Government agency obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 1,497 | 1,495
Gross unrealized gains | 2 | 1
Gross unrealized losses | (5) | (11)
Fair value | 1,494 | 1,485
Municipal obligations |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 21,173 | 16,038
Gross unrealized gains | 62 | 332
Gross unrealized losses | (78) | (5)
Fair value | 21,157 | 16,365
Collateralized mortgage obligations - government issued |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 9,148 | 11,718
Gross unrealized gains | 17 | 32
Gross unrealized losses | (38) | (41)
Fair value | 9,127 | 11,709
Collateralized mortgage obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 6,794 | 8,031
Gross unrealized gains | 6 | 12
Gross unrealized losses | (58) | (44)
Fair value | $ 6,742 | $ 7,999

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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=73527792&loc=d3e27232-111563 + Details
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