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Note 8 - Loans (Details) - Aging of Loan Portfolio - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Type of Loans: |  |
Loans past due | $ 85,536 | $ 112,401
Non-accrual loans | 71,241 | 70,163
Loans not past due | 9,954,396 | 8,801,679
Loans | 10,039,932 | 8,914,080
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 7,074 | 36,359
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 4,648 | 5,879
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 2,573 |
Commercial Portfolio Segment [Member] |  |
Type of Loans: |  |
Loans past due | 24,519 | 19,816
Non-accrual loans | 14,758 | 6,983
Loans not past due | 2,337,540 | 2,362,677
Loans | 2,362,059 | 2,382,493
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 5,865 | 11,595
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 3,896 | 1,238
Real Estate Construction Portfolio Segment [Member] |  |
Type of Loans: |  |
Loans past due | 16,579 | 21,379
Non-accrual loans | 16,579 | 19,963
Loans not past due | 388,699 | 277,275
Loans | 405,278 | 298,654
Real Estate Construction Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due |  | 1,416
Commercial Real Estate Portfolio Segment [Member] |  |
Type of Loans: |  |
Loans past due | 37,142 | 57,169
Non-accrual loans | 33,214 | 35,606
Loans not past due | 5,238,428 | 4,429,274
Loans | 5,275,570 | 4,486,443
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 1,114 | 17,654
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 241 | 3,909
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 2,573 |
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Type of Loans: |  |
Loans past due | 7,296 | 13,977
Non-accrual loans | 6,690 | 7,611
Loans not past due | 1,983,958 | 1,728,961
Loans | 1,991,254 | 1,742,938
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 95 | 5,634
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due | 511 | 732
Consumer Portfolio Segment [Member] |  |
Type of Loans: |  |
Loans past due |  | 60
Loans not past due | 5,771 | 3,492
Loans | $ 5,771 | 3,552
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Type of Loans: |  |
Loans past due |  | $ 60

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