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Fair Value of Financial Instruments (Level 3 assets and liabilities measured at fair value) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Foreclosed real estate | $ 12,571 | $ 9,532
Impaired Loans [Member] |  |
Impaired loans | $ 14,086 | $ 12,284
Valuation technique | Appraised value; PV of expected cash flows | Appraised value; PV of expected cash flows
Significant unobservable inputs | Discounts to reflect current market conditions, ultimate collectability, and estimated costs to sell | Discounts to reflect current market conditions, ultimate collectability, and estimated costs to sell
General range of significant input values, minimum | 0.00% | 0.00%
General range of significant input values, maximum | 10.00% | 10.00%
Foreclosed Real Estate [Member] |  |
Foreclosed real estate | $ 12,571 | $ 9,532
Valuation technique | Appraised value; List or contract price | Appraised value; List or contract price
Significant unobservable inputs | Discounts to reflect current market conditions and estimated costs to sell | Discounts to reflect current market conditions and estimated costs to sell
General range of significant input values, minimum | 0.00% | 0.00%
General range of significant input values, maximum | 10.00% | 10.00%

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- Definition Description of significant assumptions used by management to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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