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Note 7 - Loans - Aging of Loan Portfolio (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
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Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans past due | $ 45,409 | $ 8,367
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans past due | 6,807 | 221
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans past due |  |
Commercial Portfolio Segment [Member] |  |
Loans past due | 61,467 | 12,133
Non-accrual loans | 9,251 | 3,545
Loans not past due | 2,187,529 | 2,304,730
Loans | 2,248,996 | 2,316,863
Real Estate Construction Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans past due |  | 7,285
Real Estate Construction Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans past due |  |
Real Estate Construction Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans past due |  |
Real Estate Construction Portfolio Segment [Member] |  |
Loans past due | 5,507 | 23,591
Non-accrual loans | 5,507 | 16,306
Loans not past due | 509,729 | 417,952
Loans | 515,236 | 441,543
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans past due | 12,949 | 2,243
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans past due | 12,205 | 2,223
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans past due |  |
Commercial Real Estate Portfolio Segment [Member] |  |
Loans past due | 46,231 | 29,697
Non-accrual loans | 21,077 | 25,231
Loans not past due | 5,697,760 | 5,271,521
Loans | 5,743,991 | 5,301,218
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans past due |  | 4,959
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans past due | 477 | 1,038
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans past due |  |
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans past due | 9,001 | 13,045
Non-accrual loans | 8,524 | 7,048
Loans not past due | 2,490,423 | 2,088,290
Loans | 2,499,424 | 2,101,335
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans past due |  |
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans past due |  |
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans past due |  |
Consumer Portfolio Segment [Member] |  |
Loans past due |  |
Non-accrual loans |  |
Loans not past due | 2,810 | 2,493
Loans | 2,810 | 2,493
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Loans past due | 58,358 | 22,854
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Loans past due | 19,489 | 3,482
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Loans past due |  |
Loans past due | 122,206 | 78,466
Non-accrual loans | 44,359 | 52,130
Loans not past due | 10,888,251 | 10,084,986
Loans | $ 11,010,457 | $ 10,163,452

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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953401-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. 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=65884687&loc=d3e4428-111522 + Details
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