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Note 5 - Loans and Allowance for Credit Losses (Details) - Loans and Leases by Credit Quality Indicator - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | $ 4,998,368 | $ 4,312,399
Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 4,920,279 | 4,202,744
Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 46,573 | 64,345
Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 31,516 | 45,310
Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 1,052,257 | 916,226
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 1,021,427 | 875,102
Commercial Portfolio Segment [Member] | Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 17,822 | 23,512
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 13,008 | 17,612
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Income Producing Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 2,115,478 | 1,703,172
Income Producing Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 2,096,032 | 1,679,101
Income Producing Portfolio Segment [Member] | Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 13,328 | 18,962
Income Producing Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 6,118 | 5,109
Income Producing Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Owner Occupied Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 498,103 | 461,581
Owner Occupied Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 488,496 | 445,013
Owner Occupied Portfolio Segment [Member] | Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 7,854 | 9,677
Owner Occupied Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 1,753 | 6,891
Owner Occupied Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Residential Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 147,365 | 148,018
Residential Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 146,651 | 147,262
Residential Portfolio Segment [Member] | Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 714 | 756
Residential Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Residential Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Construction Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 1,065,376 | 851,464
Construction Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 1,049,926 | 827,503
Construction Portfolio Segment [Member] | Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 4,996 | 9,720
Construction Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 10,454 | 14,241
Construction Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Home Equity Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 112,885 | 122,536
Home Equity Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 110,870 | 119,420
Home Equity Portfolio Segment [Member] | Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 1,854 | 1,718
Home Equity Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 161 | 1,398
Home Equity Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 0 | 0
Other Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 6,904 | 109,402
Other Consumer Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 6,877 | 109,343
Other Consumer Portfolio Segment [Member] | Watch and Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 5 | 0
Other Consumer Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | 22 | 59
Other Consumer Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable Net of Deferred Income | $ 0 | $ 0

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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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