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Note 5 - Loans and Allowance for Loan Losses - Age Analysis of Past Due Loans, Excluding Loans Acquired, Segregated by Class of Loans (Details) - USD ($) | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Loans | $ 6,303,000,000 | $ 5,633,000,000
Loans, Excluding Acquired Loans [Member] |  |
Past Due | 46,781,000 | 40,313,000
Current | 5,164,531,000 | 4,286,894,000
Loans | 5,211,312,000 | 4,327,207,000
90 Days Past Due & Accruing | 232,000 | 300,000
Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 15,973,000 | 18,605,000
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 30,808,000 | 21,708,000
Consumer Portfolio Segment [Member] |  |
Loans | 494,262,000 | 488,563,000
Consumer Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 8,587,000 | 5,804,000
Current | 485,675,000 | 482,759,000
Loans | 494,262,000 | 488,563,000
90 Days Past Due & Accruing | 222,000 | 286,000
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 5,525,000 | 4,502,000
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 3,062,000 | 1,302,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] |  |
Loans | 176,316,000 | 184,591,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 1,147,000 | 991,000
Current | 175,169,000 | 183,600,000
Loans | 176,316,000 | 184,591,000
90 Days Past Due & Accruing | 218,000 | 275,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 655,000 | 716,000
Consumer Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 492,000 | 275,000
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Loans | 317,946,000 | 303,972,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 7,440,000 | 4,813,000
Current | 310,506,000 | 299,159,000
Loans | 317,946,000 | 303,972,000
90 Days Past Due & Accruing | 4,000 | 11,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 4,870,000 | 3,786,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 2,570,000 | 1,027,000
Commercial Real Estate Portfolio Segment [Member] |  |
Loans | 3,794,900,000 | 3,028,079,000
Commercial Real Estate Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 24,196,000 | 25,837,000
Current | 3,770,704,000 | 3,002,242,000
Loans | 3,794,900,000 | 3,028,079,000
90 Days Past Due & Accruing |  | 14,000
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 8,988,000 | 11,942,000
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 15,208,000 | 13,895,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Loans | 515,274,000 | 336,759,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 1,918,000 | 2,666,000
Current | 513,356,000 | 334,093,000
Loans | 515,274,000 | 336,759,000
90 Days Past Due & Accruing |  |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 440,000 | 1,420,000
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 1,478,000 | 1,246,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Loans | 1,048,403,000 | 904,245,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 10,301,000 | 12,237,000
Current | 1,038,102,000 | 892,008,000
Loans | 1,048,403,000 | 904,245,000
90 Days Past Due & Accruing |  | 14,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 5,516,000 | 6,310,000
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 4,785,000 | 5,927,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] |  |
Loans | 2,231,223,000 | 1,787,075,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 11,977,000 | 10,934,000
Current | 2,219,246,000 | 1,776,141,000
Loans | 2,231,223,000 | 1,787,075,000
90 Days Past Due & Accruing |  |
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 3,032,000 | 4,212,000
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 8,945,000 | 6,722,000
Commercial Portfolio Segment [Member] |  |
Loans | 896,809,000 | 789,903,000
Commercial Portfolio Segment [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 13,998,000 | 8,672,000
Current | 882,811,000 | 781,231,000
Loans | 896,809,000 | 789,903,000
90 Days Past Due & Accruing | 10,000 |
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 1,460,000 | 2,161,000
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 12,538,000 | 6,511,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans | 688,960,000 | 639,525,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 11,736,000 | 7,336,000
Current | 677,224,000 | 632,189,000
Loans | 688,960,000 | 639,525,000
90 Days Past Due & Accruing | 10,000 |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 991,000 | 2,040,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 10,745,000 | 5,296,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |
Loans | 207,849,000 | 150,378,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 2,262,000 | 1,336,000
Current | 205,587,000 | 149,042,000
Loans | 207,849,000 | 150,378,000
90 Days Past Due & Accruing |  |
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 469,000 | 121,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due | 1,793,000 | 1,215,000
Unallocated Financing Receivables [Member] |  |
Loans | 25,341,000 | 20,662,000
Unallocated Financing Receivables [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due |  |
Current | 25,341,000 | 20,662,000
Loans | 25,341,000 | 20,662,000
90 Days Past Due & Accruing |  |
Unallocated Financing Receivables [Member] | Financing Receivables, 30 to 89 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due |  |
Unallocated Financing Receivables [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Loans, Excluding Acquired Loans [Member] |  |
Past Due |  |

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