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Note 5 - Loans and Allowance for Credit Losses (Details) - Impaired Loans - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | $ 35,653 | $ 37,420
Recorded Investment With No Allowance | 9,873 | 20,454
Recorded Investment With Allowance | 21,643 | 15,491
Total Recorded Investment | 31,516 | 35,945
Related Allowance | 5,902 | 8,064
Interest Income Recognized | 629 |
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 16,123 | 14,075
Recorded Investment With No Allowance | 2,396 | 1,603
Recorded Investment With Allowance | 10,283 | 11,372
Total Recorded Investment | 12,679 | 12,975
Related Allowance | 3,478 | 5,334
Income Producing Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 6,811 | 10,869
Recorded Investment With No Allowance | 1,190 | 8,952
Recorded Investment With Allowance | 4,928 | 1,542
Total Recorded Investment | 6,118 | 10,494
Related Allowance | 1,033 | 751
Owner Occupied Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 1,753 | 1,889
Recorded Investment With No Allowance | 946 | 1,038
Recorded Investment With Allowance | 807 | 851
Total Recorded Investment | 1,753 | 1,889
Related Allowance | 400 | 577
Residential Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 329 | 346
Recorded Investment With No Allowance | 329 | 346
Recorded Investment With Allowance | 0 | 0
Total Recorded Investment | 329 | 346
Related Allowance | 0 | 0
Construction Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 10,454 | 8,785
Recorded Investment With No Allowance | 4,877 | 8,176
Recorded Investment With Allowance | 5,577 | 609
Total Recorded Investment | 10,454 | 8,785
Related Allowance | 950 | 927
Home Equity Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 161 | 1,398
Recorded Investment With No Allowance | 116 | 339
Recorded Investment With Allowance | 45 | 1,059
Total Recorded Investment | 161 | 1,398
Related Allowance | 38 | 430
Other Consumer Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Contractual Principal Balance | 22 | 58
Recorded Investment With No Allowance | 19 | 0
Recorded Investment With Allowance | 3 | 58
Total Recorded Investment | 22 | 58
Related Allowance | 3 | 45
Quarter to Date [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 30,607 | 36,584
Interest Income Recognized | 22 | 691
Quarter to Date [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 9,340 | 14,203
Interest Income Recognized | 21 | 20
Quarter to Date [Member] | Income Producing Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 10,675 | 8,202
Interest Income Recognized | 95 | 196
Quarter to Date [Member] | Owner Occupied Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 1,772 | 2,696
Interest Income Recognized | 0 | 0
Quarter to Date [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 331 | 348
Interest Income Recognized | 0 | 0
Quarter to Date [Member] | Construction Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 8,031 | 10,113
Interest Income Recognized | (93) | 436
Quarter to Date [Member] | Home Equity Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 411 | 993
Interest Income Recognized | 0 | 32
Quarter to Date [Member] | Other Consumer Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 47 | 29
Interest Income Recognized | (1) | 7
Year to Date [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 30,688 | 36,961
Interest Income Recognized | 629 | 1,650
Year to Date [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 9,973 | 13,681
Interest Income Recognized | 69 | 251
Year to Date [Member] | Income Producing Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 10,294 | 7,021
Interest Income Recognized | 354 | 203
Year to Date [Member] | Owner Occupied Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 1,810 | 3,986
Interest Income Recognized | 0 | 6
Year to Date [Member] | Residential Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 336 | 529
Interest Income Recognized | 0 | 0
Year to Date [Member] | Construction Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 7,594 | 10,967
Interest Income Recognized | 205 | 1,147
Year to Date [Member] | Home Equity Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 650 | 747
Interest Income Recognized | 0 | 36
Year to Date [Member] | Other Consumer Portfolio Segment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment | 31 | 30
Interest Income Recognized | $ 1 | $ 7

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