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Note 5 - Loans Acquired - Summary of Acquired Loans, Excluding Loans Covered by Loss Share (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Balance, end of period | $ 5,632,890 | $ 4,919,355
Pass [Member] |  |
Balance, end of period | 5,433,036 | 4,745,322
Special Mention [Member] |  |
Balance, end of period | 33,865 | 20,334
Substandard [Member] |  |
Balance, end of period | 164,251 | 148,719
Doubtful [Member] |  |
Balance, end of period | 1,715 | 4,521
Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period | 23 | 459
Acquired Loans [Member] |  |
Balance, end of period | 1,305,683 | 1,672,901
Acquired Loans [Member] | Pass [Member] |  |
Balance, end of period | 1,217,886 | 1,590,384
Acquired Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 22,181 | 9,150
Acquired Loans [Member] | Substandard [Member] |  |
Balance, end of period | 64,075 | 69,219
Acquired Loans [Member] | Doubtful [Member] |  |
Balance, end of period | 1,541 | 3,689
Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  | 459
Consumer Portfolio Segment [Member] |  |
Balance, end of period | 488,563 | 385,668
Consumer Portfolio Segment [Member] | Pass [Member] |  |
Balance, end of period | 485,575 | 383,878
Consumer Portfolio Segment [Member] | Special Mention [Member] |  |
Balance, end of period | 26 |
Consumer Portfolio Segment [Member] | Substandard [Member] |  |
Balance, end of period | 2,962 | 1,741
Consumer Portfolio Segment [Member] | Doubtful [Member] |  |
Balance, end of period |  | 49
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Balance, end of period | 303,972 | 208,380
Consumer Portfolio Segment [Member] | Other Loans [Member] | Pass [Member] |  |
Balance, end of period | 301,632 | 207,069
Consumer Portfolio Segment [Member] | Other Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 26 |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Substandard [Member] |  |
Balance, end of period | 2,314 | 1,262
Consumer Portfolio Segment [Member] | Other Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  | 49
Consumer Portfolio Segment [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] |  |
Balance, end of period | 49,677 | 75,606
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member] |  |
Balance, end of period | 48,992 | 75,330
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 14 |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member] |  |
Balance, end of period | 671 | 276
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] |  |
Balance, end of period | 49,677 | 75,606
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Pass [Member] |  |
Balance, end of period | 48,992 | 75,330
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 14 |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Substandard [Member] |  |
Balance, end of period | 671 | 276
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Real Estate Portfolio Segment [Member] |  |
Balance, end of period | 3,028,079 | 2,204,992
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |
Balance, end of period | 2,943,890 | 2,128,687
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |
Balance, end of period | 10,996 | 8,424
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |
Balance, end of period | 73,019 | 67,104
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |
Balance, end of period | 174 | 777
Commercial Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Balance, end of period | 336,759 | 279,740
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member] |  |
Balance, end of period | 330,080 | 270,386
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 98 | 319
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member] |  |
Balance, end of period | 6,565 | 9,019
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Doubtful [Member] |  |
Balance, end of period | 16 | 16
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Balance, end of period | 904,245 | 696,180
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Pass [Member] |  |
Balance, end of period | 875,603 | 679,484
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 4,024 | 2,701
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Substandard [Member] |  |
Balance, end of period | 24,460 | 13,824
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Doubtful [Member] |  |
Balance, end of period | 158 | 171
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] |  |
Balance, end of period | 1,170,871 | 1,432,189
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member] |  |
Balance, end of period | 1,092,275 | 1,360,505
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 20,168 | 8,818
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member] |  |
Balance, end of period | 56,893 | 60,732
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member] |  |
Balance, end of period | 1,535 | 1,675
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  | 459
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] |  |
Balance, end of period | 690,108 | 854,068
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Pass [Member] |  |
Balance, end of period | 641,018 | 812,537
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 17,384 | 7,328
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Substandard [Member] |  |
Balance, end of period | 31,706 | 33,748
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  | 455
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] |  |
Balance, end of period | 57,587 | 77,119
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Pass [Member] |  |
Balance, end of period | 50,704 | 68,775
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 88 |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Substandard [Member] |  |
Balance, end of period | 6,795 | 8,344
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] |  |
Balance, end of period | 423,176 | 501,002
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Pass [Member] |  |
Balance, end of period | 400,553 | 479,193
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 2,696 | 1,490
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Substandard [Member] |  |
Balance, end of period | 18,392 | 18,640
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Doubtful [Member] |  |
Balance, end of period | 1,535 | 1,675
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  | 4
Commercial Portfolio Segment [Member] |  |
Balance, end of period | 789,903 | 648,679
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Balance, end of period | 765,023 | 635,351
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |
Balance, end of period | 662 | 2,760
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Balance, end of period | 24,195 | 10,562
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |
Balance, end of period |  | 6
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period | 23 |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Balance, end of period | 639,525 | 500,116
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Pass [Member] |  |
Balance, end of period | 616,805 | 487,563
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 558 | 2,760
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Substandard [Member] |  |
Balance, end of period | 22,162 | 9,787
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  | 6
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |
Balance, end of period | 150,378 | 148,563
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Pass [Member] |  |
Balance, end of period | 148,218 | 147,788
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 104 |
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Substandard [Member] |  |
Balance, end of period | 2,033 | 775
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  |
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period | 23 |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] |  |
Balance, end of period | 85,135 | 165,106
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member] |  |
Balance, end of period | 76,619 | 154,549
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 1,999 | 332
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member] |  |
Balance, end of period | 6,511 | 8,211
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member] |  |
Balance, end of period | 6 | 2,014
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] |  |
Balance, end of period | 81,837 | 154,533
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Pass [Member] |  |
Balance, end of period | 73,609 | 144,239
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 1,965 | 332
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Substandard [Member] |  |
Balance, end of period | 6,257 | 7,948
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Doubtful [Member] |  |
Balance, end of period | 6 | 2,014
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] |  |
Balance, end of period | 3,298 | 10,573
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Pass [Member] |  |
Balance, end of period | 3,010 | 10,310
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Special Mention [Member] |  |
Balance, end of period | 34 |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Substandard [Member] |  |
Balance, end of period | 254 | 263
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Doubtful [Member] |  |
Balance, end of period |  |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Balance, end of period |  |

X
- 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=65884687&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=66008989&loc=d3e5074-111524 + Details
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