Note 15 - Off-balance Sheet Risk - Exposure to Off-balance Sheet Risk (Details) $ in Thousands |
Dec. 31, 2016
USD ($)
|
|---|---|
| Undisbursed Lines of Credit [Member] | |
| Other commitments | $ 758,311 |
| Standby Letter of Credit Member [Member] | |
| Other commitments | 8,241 |
| Commercial Letters of Credit [Member] | |
| Other commitments | $ 9,714 |