Investment securities available for sale (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Schedule of Available-for-sale Securities [Line Items] | |||||
| Pledged Assets Separately Reported, Securities Pledged for Repurchase Agreements, at Fair Value | $ 7,335,000 | $ 7,335,000 | $ 5,968,000 | ||
| Proceeds from Sale of Available-for-sale Securities, Debt | 4,000,000 | 22,000,000 | $ 7,000,000 | ||
| Available-for-sale Securities, Gross Realized Gain (Loss) | $ 15,000 | $ 0 | $ 162,000 | $ 7,000 | |