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Note 5 - Loans and Allowance for Credit Losses (Details) - Impaired Loans - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | $ 33,833 | $ 39,186 | $ 37,420
Recorded Investment With No Allowance | 18,409 | 16,440 | 20,454
Recorded Investment With Allowance | 11,287 | 20,780 | 15,491
Total Recorded Investment | 29,696 | 37,220 | 35,945
Related Allowance | 4,227 | 8,013 | 8,064
Interest Income Recognized | 127 |  |
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | 9,444 | 16,531 | 14,075
Recorded Investment With No Allowance | 2,663 | 950 | 1,603
Recorded Investment With Allowance | 3,337 | 14,481 | 11,372
Total Recorded Investment | 6,000 | 15,431 | 12,975
Related Allowance | 2,312 | 4,409 | 5,334
Income Producing Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | 15,925 | 6,284 | 10,869
Recorded Investment With No Allowance | 9,215 | 4,839 | 8,952
Recorded Investment With Allowance | 6,017 | 1,070 | 1,542
Total Recorded Investment | 15,232 | 5,909 | 10,494
Related Allowance | 827 | 578 | 751
Owner Occupied Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | 1,790 | 3,502 | 1,889
Recorded Investment With No Allowance | 973 | 391 | 1,038
Recorded Investment With Allowance | 817 | 3,111 | 851
Total Recorded Investment | 1,790 | 3,502 | 1,889
Related Allowance | 400 | 1,330 | 577
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | 333 | 350 | 346
Recorded Investment With No Allowance | 333 | 350 | 346
Total Recorded Investment | 333 | 350 | 346
Construction Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | 5,608 | 11,931 | 8,785
Recorded Investment With No Allowance | 5,037 | 9,785 | 8,176
Recorded Investment With Allowance | 571 | 1,655 | 609
Total Recorded Investment | 5,608 | 11,440 | 8,785
Related Allowance | 350 | 1,478 | 927
Home Equity Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | 661 | 588 | 1,398
Recorded Investment With No Allowance | 116 | 125 | 339
Recorded Investment With Allowance | 545 | 463 | 1,059
Total Recorded Investment | 661 | 588 | 1,398
Related Allowance | 338 | 218 | 430
Other Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Unpaid Contractual Principal Balance | 72 |  | 58
Recorded Investment With No Allowance | 72 |  |
Recorded Investment With Allowance |  |  | 58
Total Recorded Investment | 72 |  | 58
Related Allowance |  |  | 45
Quarter to Date [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 29,111 | 33,817 | 36,584
Interest Income Recognized | 328 | 326 | 691
Quarter to Date [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 7,978 | 12,051 | 14,203
Interest Income Recognized | 39 | 228 | 20
Quarter to Date [Member] | Income Producing Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 12,542 | 5,975 | 8,202
Interest Income Recognized | 188 | (71) | 196
Quarter to Date [Member] | Owner Occupied Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 1,811 | 3,366 | 2,696
Interest Income Recognized |  | 6 |
Quarter to Date [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 336 | 500 | 348
Quarter to Date [Member] | Construction Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 5,625 | 11,429 | 10,113
Interest Income Recognized | 100 | 159 | 436
Quarter to Date [Member] | Home Equity Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 774 | 496 | 993
Interest Income Recognized |  | 4 | 32
Quarter to Date [Member] | Other Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 45 |  | 29
Interest Income Recognized | 1 |  | 7
Year to Date [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 31,794 | 36,137 | 36,961
Interest Income Recognized | 607 | 959 | 1,650
Year to Date [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 10,047 | 12,132 | 13,681
Interest Income Recognized | 48 | 231 | 251
Year to Date [Member] | Income Producing Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 11,388 | 5,873 | 7,021
Interest Income Recognized | 259 | 7 | 203
Year to Date [Member] | Owner Occupied Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 1,844 | 4,877 | 3,986
Interest Income Recognized |  | 6 | 6
Year to Date [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 340 | 665 | 529
Year to Date [Member] | Construction Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 7,176 | 12,004 | 10,967
Interest Income Recognized | 298 | 711 | 1,147
Year to Date [Member] | Home Equity Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 959 | 553 | 747
Interest Income Recognized |  | 4 | 36
Year to Date [Member] | Other Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Average Recorded Investment | 40 | $ 33 | 30
Interest Income Recognized | $ 2 |  | $ 7

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