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Investment Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
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Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | $ 129,280 | $ 127,334
Investment securities available for sale, Gross Unrealized Gains | 1,224 | 1,329
Investment securities available for sale, Gross Unrealized Losses | (1,058) | (1,586)
Available for Sale, Fair Value, Total | 129,446 | 127,077
Investment securities held to maturity, Cost Basis | 38,997 | 30,665
Investment securities held to maturity, Gross Unrealized Gains | 445 | 265
Investment securities held to maturity, Gross Unrealized Losses | (383) | (510)
Held to Maturity, Fair Value, Total | 39,059 | 30,420
U.S. Agency [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 5,435 | 400
Investment securities available for sale, Gross Unrealized Gains | 1 | 0
Investment securities available for sale, Gross Unrealized Losses | (34) | (2)
Available for Sale, Fair Value, Total | 5,402 | 398
U.S. Agency mortgage-backed securities [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 80,756 | 88,738
Investment securities available for sale, Gross Unrealized Gains | 866 | 1,132
Investment securities available for sale, Gross Unrealized Losses | (382) | (686)
Available for Sale, Fair Value, Total | 81,240 | 89,184
Investment securities held to maturity, Cost Basis | 10,081 | 11,177
Investment securities held to maturity, Gross Unrealized Gains | 194 | 180
Investment securities held to maturity, Gross Unrealized Losses | (23) | (79)
Held to Maturity, Fair Value, Total | 10,252 | 11,278
Taxable Municipal [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 7,203 | 3,793
Investment securities available for sale, Gross Unrealized Gains | 30 | 3
Investment securities available for sale, Gross Unrealized Losses | (166) | (174)
Available for Sale, Fair Value, Total | 7,067 | 3,622
Investment securities held to maturity, Cost Basis | 22,873 | 13,441
Investment securities held to maturity, Gross Unrealized Gains | 222 | 70
Investment securities held to maturity, Gross Unrealized Losses | (314) | (348)
Held to Maturity, Fair Value, Total | 22,781 | 13,163
Corporate bonds [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities available for sale, Cost Basis | 35,886 | 34,403
Investment securities available for sale, Gross Unrealized Gains | 327 | 194
Investment securities available for sale, Gross Unrealized Losses | (476) | (724)
Available for Sale, Fair Value, Total | 35,737 | 33,873
Corporate bonds and other securities [Member] |  |
Available-For-Sale-Securities-And-Held-To-Maturity-Securities |  |
Investment securities held to maturity, Cost Basis | 6,043 | 6,047
Investment securities held to maturity, Gross Unrealized Gains | 29 | 15
Investment securities held to maturity, Gross Unrealized Losses | (46) | (83)
Held to Maturity, Fair Value, Total | $ 6,026 | $ 5,979

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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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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + 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 (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + 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 (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt and equity 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 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 after other than temporary impairment (OTTI) accretion, of 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 (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.6) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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