Note 5 - Securities - Securities in a Continuous Loss Position (Details) - USD ($)
|
Sep. 30, 2016 |
Dec. 31, 2015 |
| US Government Agencies Debt Securities [Member] |
|
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Fair Value |
$ 90,723,000
|
$ 88,255,000
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Unrealized Loss |
253,000
|
1,800,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Fair Value |
0
|
84,959,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Unrealized Loss |
0
|
3,329,000
|
| US States and Political Subdivisions Debt Securities [Member] |
|
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Fair Value |
780,000
|
3,449,000
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Unrealized Loss |
1,000
|
24,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Fair Value |
1,440,000
|
10,161,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Unrealized Loss |
24,000
|
306,000
|
| Other Securities [Member] |
|
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Fair Value |
0
|
0
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Unrealized Loss |
0
|
0
|
| Securities in a Continuours Loss Position, 12 Months or More, Fair Value |
152,000
|
127,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Unrealized Loss |
37,000
|
62,000
|
| Corporate Debt Securities [Member] |
|
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Fair Value |
|
4,974,000
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Unrealized Loss |
|
292,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Fair Value |
|
200,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Unrealized Loss |
|
1,000
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Fair Value |
91,503,000
|
96,678,000
|
| Securities in a Continuours Loss Position, Less Than 12 Months, Unrealized Loss |
254,000
|
2,116,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Fair Value |
1,592,000
|
95,447,000
|
| Securities in a Continuours Loss Position, 12 Months or More, Unrealized Loss |
$ 61,000
|
$ 3,698,000
|