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Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of fair value recurring basis - Municipal Securities [Member] - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Balance of recurring Level 3 assets at January 1 |  | $ 18,218 |
Other | [1] |  | 18,335
Principal paydowns |  | (8,586) | (117)
Balance of recurring Level 3 assets At December 31 |  | $ 9,632 | $ 18,218
[1] | Includes transfers from held-to-maturity to available-for-sale designation

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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the Other assumptions market participants would use in pricing. + References No definition available. + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the Other assumptions market participants would use in pricing principal pay down. + References No definition available. + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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 (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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