Investment Securities (Details 2) $ in Thousands	Dec. 31, 2017 USD ($)
Amortized cost and fair value of debt securities by contractual maturity
Amortized Cost, Due in one year or less	$ 10
Amortized Cost, Due after one year through five years	860
Amortized Cost, Due after five years through ten years	8,437
Amortized Cost, Due after ten years	77,266
Amortized Cost, Total	86,573
Total debt securities, Amortized Cost	162,102
Fair Value, Due in one year or less	10
Fair Value, Due after one year through five years	894
Fair Value, Due after five years through ten years	8,315
Fair Value, Due after ten years	76,652
Fair Value, Total	85,871
Total debt securities, Fair Value	159,841
U.S. Government-sponsored mortgage-backed and related securities
Amortized cost and fair value of debt securities by contractual maturity
Total debt securities, Amortized Cost	75,529
Total debt securities, Fair Value	$ 73,970