Note 19 - Fair Value Disclosures - Assets Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Available for Sale Securities |
$ 488,067
|
$ 496,859
|
| US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
275,000
|
369,061
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
146,209
|
103,252
|
| US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available for Sale Securities |
30,609
|
17,469
|
| Corporate Debt Securities [Member] |
|
|
| Available for Sale Securities |
34,160
|
4,950
|
| Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
| Available for Sale Securities |
2,089
|
2,127
|
| Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
2,089
|
2,127
|
| Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
| Available for Sale Securities |
485,978
|
494,732
|
| Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
275,000
|
369,061
|
| Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
146,209
|
103,252
|
| Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available for Sale Securities |
30,609
|
17,469
|
| Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] |
|
|
| Available for Sale Securities |
34,160
|
4,950
|
| Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
|
|