Securities (Details 1) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Amortized Cost
Due in one year or less	$ 5,805
Due after one but within five years	53,736
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	89,114
Due after ten years	89,684
Total of securities having specified maturity period	238,339
TOTAL	842,700	$ 876,796
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	604,361
Fair Value
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	5,843
Due after one but within five years	55,141
Due after five but within ten years	94,355
Due after ten years	95,090
Total of securities having specified maturities period	250,429
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	616,272
Securities available-for-sale	$ 866,701	$ 891,082