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Investment Securities (Investments Classified by Contractual Maturity Date) (Details) - USD ($) | Sep. 30, 2017 | Dec. 31, 2016
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Schedule of Investments [Line Items] |  |
Available for sale Securities, Amortized Cost, Due in 1 year or less | $ 596,000 |
Available for sale Securities, Amortized Cost, Due after 1 year but within 5 years | 12,542,000 |
Available for sale Securities, Amortized Cost, Due after 5 years but within 10 years | 46,306,000 |
Available for sale Securities, Amortized Cost, Due after 10 years | 10,082,000 |
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Total | 69,526,000 |
Equity Securities, Amortized Cost | 1,268,000 |
Available-for-sale securities, Amortized Cost | 98,164,000 | $ 138,048,000
Available for sale Securities, Fair Value, Due in 1 year or less | 596,000 |
Available for sale Securities, Fair Value, Due after 1 year but within 5 years | 12,446,000 |
Available for sale Securities, Fair Value, Due after 5 years but within 10 years | 45,375,000 |
Available for sale Securities, Fair Value, Due after 10 years | 9,819,000 |
Available-for-sale Securities, Debt Maturities, Single Maturity Date, Fair Value, Total | 68,236,000 |
Equity Securities, Fair Value | 1,231,000 |
Available for sale Securities, Fair Value | 96,513,000 | 133,625,000
Held-to-maturity, Due after 1 year through 5 years, Amortized Cost | 19,332,000 |
Held-to-maturity, Due after 5 years through 10 years, Amortized Cost | 11,967,000 |
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis | 31,299,000 |
Held-to-maturity securities, Amortized Cost | 82,625,000 | 0
Held-to-maturity, Due after 1 year through 5, Fair Value | 19,421,000 |
Held-to-maturity, Due after 5 years through 10 years, Fair Value | 11,975,000 |
Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value | 31,396,000 |
Held-to-maturity, Fair Value | 82,716,000 | $ 0
Mortgage-backed securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Securities without a Single Maturity Date, Amortized Cost | 27,370,000 |
Available for sale securities without a Single Maturity Date, Fair Value | 27,046,000 |
Held-to-maturity without Single Maturity Date, Amortized Cost | 51,326,000 |
Held-to-maturity without Single Maturity Date, Fair Value | $ 51,320,000 |

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- Definition This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition Fair value of investment in held-to-maturity debt securities with a single maturity date. + 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 (f) -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 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 + Details
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- Definition Amount of held-to-maturity debt securities at fair value that do not have a single maturity date and which the entity has decided to disclose separately rather than allocating the fair value over several maturity groupings. + 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 (f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- Definition Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, over several maturity groupings. + 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 (d),(f) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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- Definition Fair value 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 (aa) -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 50 -Paragraph 5 -Subparagraph (f) -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 50 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 + Details
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