Securities (Details 1) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Amortized Cost
Due in one year or less	$ 3,399
Due after one but within five years	40,291
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	88,042
Due after ten years	93,321
Total of securities having specified maturity period	225,053
TOTAL	866,840	$ 880,946
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	641,787
Fair Value
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	3,426
Due after one but within five years	41,512
Due after five but within ten years	91,552
Due after ten years	101,087
Total of securities having specified maturities period	237,577
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	648,259
Securities available-for-sale	$ 885,836	$ 897,053