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Note 5 - Loans and Allowance for Credit Losses - Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015
Unpaid Contractual Principal Balance | $ 28,468 | $ 29,212 | $ 28,468 | $ 29,212
Recorded Investment With No Allowance | 11,361 | 4,997 | 11,361 | 4,997
Recorded Investment With Allowance | 14,438 | 20,078 | 14,438 | 20,078
Total Recorded Investment | 25,799 | 25,075 | 25,799 | 25,075
Related Allowance | 5,599 | 5,902 | 5,599 | 5,902
Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 37,052 | 30,607 |  |
Interest Income Recognized |  |  | 135 | 22
Year to Date [Member] |  |  |  |
Average Recorded Investment | 37,938 | 30,688 |  |
Interest Income Recognized |  |  | 406 | 629
Commercial Portfolio Segment [Member] |  |  |  |
Unpaid Contractual Principal Balance | 8,296 | 9,555 | 8,296 | 9,555
Recorded Investment With No Allowance | 2,532 | 2,396 | 2,532 | 2,396
Recorded Investment With Allowance | 3,095 | 3,715 | 3,095 | 3,715
Total Recorded Investment | 5,627 | 6,111 | 5,627 | 6,111
Related Allowance | 2,671 | 3,478 | 2,671 | 3,478
Commercial Portfolio Segment [Member] | Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 12,620 | 9,671 |  |
Interest Income Recognized |  |  | 79 | 21
Commercial Portfolio Segment [Member] | Year to Date [Member] |  |  |  |
Average Recorded Investment | 12,755 | 10,309 |  |
Interest Income Recognized |  |  | 191 | 69
Income Producing Portfolio Segment [Member] |  |  |  |
Unpaid Contractual Principal Balance | 14,936 | 11,814 | 14,936 | 11,814
Recorded Investment With No Allowance | 5,048 | 1,190 | 5,048 | 1,190
Recorded Investment With Allowance | 9,888 | 9,931 | 9,888 | 9,931
Total Recorded Investment | 14,936 | 11,121 | 14,936 | 11,121
Related Allowance | 1,943 | 1,033 | 1,943 | 1,033
Income Producing Portfolio Segment [Member] | Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 16,742 | 10,675 |  |
Interest Income Recognized |  |  | 54 | 95
Income Producing Portfolio Segment [Member] | Year to Date [Member] |  |  |  |
Average Recorded Investment | 17,533 | 10,294 |  |
Interest Income Recognized |  |  | 198 | 354
Owner Occupied Portfolio Segment [Member] |  |  |  |
Unpaid Contractual Principal Balance | 2,483 | 1,753 | 2,483 | 1,753
Recorded Investment With No Allowance | 1,691 | 946 | 1,691 | 946
Recorded Investment With Allowance | 792 | 807 | 792 | 807
Total Recorded Investment | 2,483 | 1,753 | 2,483 | 1,753
Related Allowance | 350 | 400 | 350 | 400
Owner Occupied Portfolio Segment [Member] | Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 2,233 | 1,772 |  |
Interest Income Recognized |  |  |  |
Owner Occupied Portfolio Segment [Member] | Year to Date [Member] |  |  |  |
Average Recorded Investment | 2,106 | 1,810 |  |
Interest Income Recognized |  |  | 13 |
Residential Portfolio Segment [Member] |  |  |  |
Unpaid Contractual Principal Balance | 555 | 329 | 555 | 329
Recorded Investment With No Allowance | 555 | 329 | 555 | 329
Recorded Investment With Allowance |  |  |  |
Total Recorded Investment | 555 | 329 | 555 | 329
Related Allowance |  |  |  |
Average Recorded Investment |  |  |  |
Interest Income Recognized |  |  |  |
Residential Portfolio Segment [Member] | Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 246 |  |  |
Interest Income Recognized |  |  |  |
Residential Portfolio Segment [Member] | Year to Date [Member] |  |  |  |
Average Recorded Investment | 249 |  |  |
Interest Income Recognized |  |  |  |
Construction Portfolio Segment [Member] |  |  |  |
Unpaid Contractual Principal Balance | 2,072 | 5,577 | 2,072 | 5,577
Recorded Investment With No Allowance | 1,535 |  | 1,535 |
Recorded Investment With Allowance | 537 | 5,577 | 537 | 5,577
Total Recorded Investment | 2,072 | 5,577 | 2,072 | 5,577
Related Allowance | 522 | 950 | 522 | 950
Construction Portfolio Segment [Member] | Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 5,091 | 8,031 |  |
Interest Income Recognized |  |  |  | (93)
Construction Portfolio Segment [Member] | Year to Date [Member] |  |  |  |
Average Recorded Investment | 5,174 | 7,594 |  |
Interest Income Recognized |  |  |  | 205
Home Equity Portfolio Segment [Member] |  |  |  |
Unpaid Contractual Principal Balance |  | 161 |  | 161
Recorded Investment With No Allowance |  | 116 |  | 116
Recorded Investment With Allowance |  | 45 |  | 45
Total Recorded Investment |  | 161 |  | 161
Related Allowance |  | 38 |  | 38
Home Equity Portfolio Segment [Member] | Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 78 | 411 |  |
Interest Income Recognized |  |  |  |
Home Equity Portfolio Segment [Member] | Year to Date [Member] |  |  |  |
Average Recorded Investment | 89 | 650 |  |
Interest Income Recognized |  |  |  |
Other Consumer Portfolio Segment [Member] |  |  |  |
Unpaid Contractual Principal Balance | 126 | 23 | 126 | 23
Recorded Investment With No Allowance |  | 20 |  | 20
Recorded Investment With Allowance | 126 | 3 | 126 | 3
Total Recorded Investment | 126 | 23 | 126 | 23
Related Allowance | 113 | 3 | 113 | 3
Other Consumer Portfolio Segment [Member] | Quarter to Date [Member] |  |  |  |
Average Recorded Investment | 42 | 47 |  |
Interest Income Recognized |  |  | 2 | (1)
Other Consumer Portfolio Segment [Member] | Year to Date [Member] |  |  |  |
Average Recorded Investment | $ 32 | $ 31 |  |
Interest Income Recognized |  |  | $ 4 | $ 1

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5258-111524 + Details
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