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Note 6 - Loans Acquired - Summary of Acquired Loans, Excluding Loans Covered by Loss Share (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Acquired loans | $ 10,779,685 | $ 5,632,890
Pass [Member] |  |
Acquired loans | 10,302,189 | 5,433,036
Special Mention [Member] |  |
Acquired loans | 301,922 | 33,865
Substandard [Member] |  |
Acquired loans | 175,064 | 164,251
Doubtful [Member] |  |
Acquired loans | 376 | 1,715
Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans | 134 | 23
Acquired Loans [Member] |  |
Acquired loans | 5,074,076 | 1,305,683
Acquired Loans [Member] | Pass [Member] |  |
Acquired loans | 4,782,384 | 1,217,886
Acquired Loans [Member] | Special Mention [Member] |  |
Acquired loans | 198,314 | 22,181
Acquired Loans [Member] | Substandard [Member] |  |
Acquired loans | 93,378 | 64,075
Acquired Loans [Member] | Doubtful [Member] |  |
Acquired loans |  | 1,541
Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] |  |
Acquired loans | 465,516 | 488,563
Consumer Portfolio Segment [Member] | Pass [Member] |  |
Acquired loans | 460,080 | 485,575
Consumer Portfolio Segment [Member] | Special Mention [Member] |  |
Acquired loans |  | 26
Consumer Portfolio Segment [Member] | Substandard [Member] |  |
Acquired loans | 5,436 | 2,962
Consumer Portfolio Segment [Member] | Doubtful [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Acquired loans | 280,094 | 303,972
Consumer Portfolio Segment [Member] | Other Loans [Member] | Pass [Member] |  |
Acquired loans | 275,160 | 301,632
Consumer Portfolio Segment [Member] | Other Loans [Member] | Special Mention [Member] |  |
Acquired loans |  | 26
Consumer Portfolio Segment [Member] | Other Loans [Member] | Substandard [Member] |  |
Acquired loans | 4,934 | 2,314
Consumer Portfolio Segment [Member] | Other Loans [Member] | Doubtful [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] |  |
Acquired loans |  | 49,677
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member] |  |
Acquired loans |  | 48,992
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member] |  |
Acquired loans |  | 14
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member] |  |
Acquired loans |  | 671
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] |  |
Acquired loans | 51,467 | 49,677
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Pass [Member] |  |
Acquired loans | 50,625 | 48,992
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Special Mention [Member] |  |
Acquired loans | 21 | 14
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Substandard [Member] |  |
Acquired loans | 821 | 671
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Doubtful [Member] |  |
Acquired loans |  |
Consumer Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] |  |
Acquired loans | 4,239,612 | 3,028,079
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |
Acquired loans | 4,150,321 | 2,943,890
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |
Acquired loans | 29,330 | 10,996
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |
Acquired loans | 59,658 | 73,019
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |
Acquired loans | 303 | 174
Commercial Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Acquired loans | 614,155 | 336,759
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member] |  |
Acquired loans | 603,126 | 330,080
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member] |  |
Acquired loans | 5,795 | 98
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member] |  |
Acquired loans | 5,218 | 6,565
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Doubtful [Member] |  |
Acquired loans | 16 | 16
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Acquired loans | 1,094,633 | 904,245
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Pass [Member] |  |
Acquired loans | 1,066,902 | 875,603
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Special Mention [Member] |  |
Acquired loans | 3,954 | 4,024
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Substandard [Member] |  |
Acquired loans | 23,490 | 24,460
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Doubtful [Member] |  |
Acquired loans | 287 | 158
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] |  |
Acquired loans | 3,818,037 | 1,170,871
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member] |  |
Acquired loans | 3,576,661 | 1,092,275
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member] |  |
Acquired loans | 184,392 | 20,168
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member] |  |
Acquired loans | 56,984 | 56,893
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member] |  |
Acquired loans |  | 1,535
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] |  |
Acquired loans | 2,387,777 | 690,108
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Pass [Member] |  |
Acquired loans | 2,337,097 | 641,018
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Special Mention [Member] |  |
Acquired loans | 15,064 | 17,384
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Substandard [Member] |  |
Acquired loans | 35,616 | 31,706
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Doubtful [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Other Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] |  |
Acquired loans | 637,032 | 57,587
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Pass [Member] |  |
Acquired loans | 468,610 | 50,704
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Special Mention [Member] |  |
Acquired loans | 166,710 | 88
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Substandard [Member] |  |
Acquired loans | 1,712 | 6,795
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Doubtful [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] |  |
Acquired loans | 793,228 | 423,176
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Pass [Member] |  |
Acquired loans | 770,954 | 400,553
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Special Mention [Member] |  |
Acquired loans | 2,618 | 2,696
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Substandard [Member] |  |
Acquired loans | 19,656 | 18,392
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Doubtful [Member] |  |
Acquired loans |  | 1,535
Commercial Real Estate Portfolio Segment [Member] | Acquired Loans [Member] | Single Family Residential Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Portfolio Segment [Member] |  |
Acquired loans | 973,519 | 789,903
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Acquired loans | 882,442 | 765,023
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |
Acquired loans | 74,278 | 662
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Acquired loans | 16,592 | 24,195
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |
Acquired loans | 73 |
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans | 134 | 23
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Acquired loans | 825,217 | 639,525
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Pass [Member] |  |
Acquired loans | 736,377 | 616,805
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Special Mention [Member] |  |
Acquired loans | 74,254 | 558
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Substandard [Member] |  |
Acquired loans | 14,402 | 22,162
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Doubtful [Member] |  |
Acquired loans | 50 |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans | 134 |
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |
Acquired loans | 148,302 | 150,378
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Pass [Member] |  |
Acquired loans | 146,065 | 148,218
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Special Mention [Member] |  |
Acquired loans | 24 | 104
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Substandard [Member] |  |
Acquired loans | 2,190 | 2,033
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Doubtful [Member] |  |
Acquired loans | 23 |
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  | 23
Commercial Portfolio Segment [Member] | Acquired Loans [Member] |  |
Acquired loans | 1,062,163 | 85,135
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Pass [Member] |  |
Acquired loans | 1,012,689 | 76,619
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Special Mention [Member] |  |
Acquired loans | 13,901 | 1,999
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Substandard [Member] |  |
Acquired loans | 35,573 | 6,511
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Doubtful [Member] |  |
Acquired loans |  | 6
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] |  |
Acquired loans | 995,587 | 81,837
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Pass [Member] |  |
Acquired loans | 946,322 | 73,609
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Special Mention [Member] |  |
Acquired loans | 13,901 | 1,965
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Substandard [Member] |  |
Acquired loans | 35,364 | 6,257
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Doubtful [Member] |  |
Acquired loans |  | 6
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Commercial Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] |  |
Acquired loans | 66,576 | 3,298
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Pass [Member] |  |
Acquired loans | 66,367 | 3,010
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Special Mention [Member] |  |
Acquired loans |  | 34
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Substandard [Member] |  |
Acquired loans | 209 | 254
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Doubtful [Member] |  |
Acquired loans |  |
Commercial Portfolio Segment [Member] | Acquired Loans [Member] | Agricultural Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] |  |
Acquired loans | 26,962 | 20,662
Unallocated Financing Receivables [Member] | Pass [Member] |  |
Acquired loans | 26,962 | 20,662
Unallocated Financing Receivables [Member] | Special Mention [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] | Substandard [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] | Doubtful [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] | Acquired Loans [Member] |  |
Acquired loans | 142,409 |
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Pass [Member] |  |
Acquired loans | 142,409 |
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Special Mention [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Substandard [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Doubtful [Member] |  |
Acquired loans |  |
Unallocated Financing Receivables [Member] | Acquired Loans [Member] | Unlikely to be Collected Financing Receivable [Member] |  |
Acquired loans |  |

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=82891408&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=84173941&loc=d3e5074-111524 + Details
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