Note 19 - Stock-based Compensation (Details Textual) - USD ($)
$ in Thousands |
12 Months Ended |
|
|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Apr. 27, 2010 |
Apr. 25, 2007 |
| Share-based Compensation Arrangements by Share-based Payment Award, Performance Shares, Minimum Target |
0.00%
|
|
|
|
|
| Share-based Compensation Arrangements by Share-based Payment Award, Performance Shares, Maximum Target |
150.00%
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |
|
0
|
0
|
|
|
| Restricted Stock Units (RSUs) [Member] |
|
|
|
|
|
| Allocated Share-based Compensation Expense |
$ 590
|
|
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |
$ 1,200
|
|
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |
2 years 73 days
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |
33,142
|
24,514
|
16,456
|
|
|
| Performance Shares [Member] |
|
|
|
|
|
| Allocated Share-based Compensation Expense |
$ 1,100
|
|
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized |
$ 2,000
|
|
|
|
|
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |
2 years
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period |
|
23,675
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate |
|
21.87%
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate |
|
0.82%
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Index Correlation Rate |
|
0.4505%
|
|
|
|
| Continental Bank Holdings, Inc. ("CBH") [Member] |
|
|
|
|
|
| Share-based Compensation Arrangement, Shares Assumed Through Acquisitions, Gross |
|
181,256
|
|
|
|
| Share-based Compensation Arrangement Shares Assumed Through Acquisitions, Value |
|
$ 2,300
|
|
|
|
| The 2007 Long-Term Incentive Plan [Member] |
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |
|
|
|
|
428,996
|
| The 2010 Long-Term Incentive Plan [Member] |
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant |
|
|
|
445,002
|
|