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Note 5 - Loans and Allowance for Credit Losses (Details) - Recorded Investment in Loans by Impairment Method - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Recorded investment in loans: |  |
Individually evaluated for impairment | $ 31,516 | $ 45,310
Collectively evaluated for impairment | 4,966,852 | 4,267,089
Ending balance | 4,998,368 | 4,312,399
Commercial Portfolio Segment [Member] |  |
Recorded investment in loans: |  |
Individually evaluated for impairment | 13,008 | 17,612
Collectively evaluated for impairment | 1,039,249 | 898,614
Ending balance | 1,052,257 | 916,226
Income Producing Portfolio Segment [Member] |  |
Recorded investment in loans: |  |
Individually evaluated for impairment | 6,118 | 5,109
Collectively evaluated for impairment | 2,109,360 | 1,698,063
Ending balance | 2,115,478 | 1,703,172
Owner Occupied Portfolio Segment [Member] |  |
Recorded investment in loans: |  |
Individually evaluated for impairment | 1,753 | 6,891
Collectively evaluated for impairment | 496,350 | 454,690
Ending balance | 498,103 | 461,581
Real Estate Mortgage Residential [Member] |  |
Recorded investment in loans: |  |
Individually evaluated for impairment | 0 | 0
Collectively evaluated for impairment | 147,365 | 148,018
Ending balance | 147,365 | 148,018
Construction Portfolio Segment [Member] |  |
Recorded investment in loans: |  |
Individually evaluated for impairment | 10,454 | 14,241
Collectively evaluated for impairment | 1,054,922 | 837,223
Ending balance | 1,065,376 | 851,464
Home Equity Portfolio Segment [Member] |  |
Recorded investment in loans: |  |
Individually evaluated for impairment | 161 | 1,398
Collectively evaluated for impairment | 112,724 | 121,138
Ending balance | 112,885 | 122,536
Other Consumer Portfolio Segment [Member] |  |
Recorded investment in loans: |  |
Individually evaluated for impairment | 22 | 59
Collectively evaluated for impairment | 6,882 | 109,343
Ending balance | $ 6,904 | $ 109,402

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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 + Details
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