Investment Securities (Details 1) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Available-for-sale, Due in one year or less, Amortized Cost		$ 1,408
Available-for-sale, Due after one year through five years, Amortized Cost		22,370
Available-for-sale, Due after five years through ten years, Amortized Cost		38,284
Available-for-sale, Due after ten years, Amortized Cost		48,449
Available-for-sale, MBS/CMO/REMIC, Amortized Cost		162,233
Available-for-sale, Amortized Cost		272,744
Available-for-sale, Due in one year or less, Fair Value		1,420
Available-for-sale, Due after one year through five years, Fair Value		22,694
Available-for-sale, Due after five years through ten years, Fair Value		39,267
Available-for-sale, Due after ten years, Fair Value		48,099
Available-for-sale, MBS/CMO/REMIC, Fair Value		158,630
Available-for-sale, Fair Value		270,110	$ 260,650
Held-to-maturity Securities, Due in one year or less, Amortized Cost		0
Held-to-maturity Securities, Due after one year through five years, Amortized Cost		62
Held-to-maturity,Securities, Due after five years through ten years, Amortized Cost		518
Held-to-maturity Securities, Due after ten years,Amorized Cost		0
Held-to-maturity, MBS/CMO/REMIC, Amortized Cost		62
Held-to-maturity, Amortized Cost	[1]	642	648
Held-to-maturity Securities, Due in one year or less, Fair Value		0
Held-to-maturity Securities, Due after one year through five years, Fair Value		62
Held-to-maturity, Securites, Due after five years through ten years, Fair Value		518
Held-to-maturity Securities, Due after ten years, Fair Value		0
Held-to-maturity, MBS/CMO/REMIC, Fair Value		62
Held-to-maturity, Fair Value	[1]	$ 642	$ 649

[1] FHLMC, FNMA, and GNMA certificates are residential mortgage-backed securities.