Securities (Details 1) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Amortized Cost
Due in one year or less	$ 6,173
Due after one but within five years	46,878
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	83,435
Due after ten years	111,162
Total of securities having specified maturity period	247,648
TOTAL	840,352	$ 855,521
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	592,704
Fair Value
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	6,222
Due after one but within five years	48,312
Due after five but within ten years	86,898
Due after ten years	116,034
Total of securities having specified maturities period	257,466
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	594,111
Securities available-for-sale	$ 851,577	$ 853,725