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Note 7 - Loans (Details) - Impaired Loans and Related Allowance for Credit Losses - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
With no allocated allowance |  |
Loans with no related allowance, unpaid principal balance | $ 150,765 | $ 132,395
Loans with no related allowance, recorded investment | 115,167 | 113,167
With allocated allowance |  |
Loans with related allowance, unpaid principal balance | 53,200 | 78,225
Loans with related allowance, recorded investment | 50,897 | 61,352
Allowance | 7,984 | 11,798
Total impaired loans | 203,965 | 210,620
Total impaired loans | 166,064 | 174,519
Total impaired loans | 7,984 | 11,798
Commercial Portfolio Segment [Member] |  |
With no allocated allowance |  |
Loans with no related allowance, unpaid principal balance | 17,657 | 19,479
Loans with no related allowance, recorded investment | 14,055 | 18,452
With allocated allowance |  |
Loans with related allowance, unpaid principal balance | 9,910 | 7,003
Loans with related allowance, recorded investment | 9,661 | 5,037
Allowance | 966 | 1,263
Total impaired loans | 966 | 1,263
Real Estate Construction Portfolio Segment [Member] |  |
With no allocated allowance |  |
Loans with no related allowance, unpaid principal balance | 48,790 | 32,924
Loans with no related allowance, recorded investment | 22,586 | 17,025
With allocated allowance |  |
Loans with related allowance, unpaid principal balance |  | 19,006
Loans with related allowance, recorded investment |  | 8,703
Allowance |  | 1,077
Total impaired loans |  | 1,077
Commercial Real Estate Portfolio Segment [Member] |  |
With no allocated allowance |  |
Loans with no related allowance, unpaid principal balance | 81,845 | 77,474
Loans with no related allowance, recorded investment | 76,053 | 75,172
With allocated allowance |  |
Loans with related allowance, unpaid principal balance | 28,332 | 38,197
Loans with related allowance, recorded investment | 26,822 | 34,022
Allowance | 6,554 | 8,993
Total impaired loans | 6,554 | 8,993
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
With no allocated allowance |  |
Loans with no related allowance, unpaid principal balance | 2,473 | 2,518
Loans with no related allowance, recorded investment | 2,473 | 2,518
With allocated allowance |  |
Loans with related allowance, unpaid principal balance | 14,958 | 14,019
Loans with related allowance, recorded investment | 14,414 | 13,590
Allowance | 464 | 465
Total impaired loans | $ 464 | $ 465

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