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 |