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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
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