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Note 5 - Loans (Details) - Accruing Troubled Debt Restructurings - Accruing Troubled Debt Restructuring [Member] - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | $ 81,680 | $ 104,356
Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 30,200 | 41,196
Rate Reduction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 7,044 | 26,694
Rate Reduction and Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 44,436 | 36,056
Rate Reduction and Forgiveness of Principal [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs |  | 410
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 10,024 | 16,506
Commercial Portfolio Segment [Member] | Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 8,298 | 11,572
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 1,726 | 4,934
Real Estate Construction Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 5,696 | 5,765
Real Estate Construction Portfolio Segment [Member] | Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs |  | 5,765
Real Estate Construction Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 5,696 |
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 56,546 | 73,588
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 16,701 | 20,543
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 6,045 | 26,694
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 33,800 | 26,351
Residential Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 9,414 | 8,497
Residential Portfolio Segment [Member] | Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 5,201 | 3,316
Residential Portfolio Segment [Member] | Rate Reduction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | 999 |
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs | $ 3,214 | 4,771
Residential Portfolio Segment [Member] | Rate Reduction and Forgiveness of Principal [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Accruing TDRs |  | $ 410

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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