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Securities - Amortized Cost and Fair Value of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Debt securities available-for-sale: |  |
Amortized Cost | $ 116,141 | $ 131,046
Gross Unrealized Gains | 274 | 209
Gross Unrealized Losses | (880) | (1,833)
Fair Value | 115,535 | 129,422
U.S. Government-sponsored enterprises (GSEs) [Member] |  |
Debt securities available-for-sale: |  |
Amortized Cost | 16,217 | 18,279
Gross Unrealized Gains | 3 | 8
Gross Unrealized Losses | (309) | (564)
Fair Value | 15,911 | 17,723
Municipal securities [Member] |  |
Debt securities available-for-sale: |  |
Amortized Cost | 8,341 | 8,182
Gross Unrealized Gains | 63 | 16
Gross Unrealized Losses | (41) | (179)
Fair Value | 8,363 | 8,019
Other debt securities [Member] |  |
Debt securities available-for-sale: |  |
Amortized Cost | 973 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (35) |
Fair Value | 938 |
Mortgage-backed securities [Member] |  |
Debt securities available-for-sale: |  |
Amortized Cost | 90,610 | 104,585
Gross Unrealized Gains | 208 | 185
Gross Unrealized Losses | (495) | (1,090)
Fair Value | $ 90,323 | $ 103,680

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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 + Details
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