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Note 5 - Loans Acquired (Details Textual) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 15, 2015 | Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2016 | Mar. 31, 2015 | Sep. 30, 2014
FDIC Indemnification Asset, Cash Payments Received | $ 2,368,000 | $ 2,368,000 |  |  |  |  |  |
Gain (Loss) on Contract Termination | (7,476,000) | $ (7,476,000) |  | $ (7,476,000) |  |  |  |
Non Covered Impaired Loans Allowance Reclassified |  |  | 954,000 | 954,000 | 954,000 |  |  |
Covered Purchased Impaired Loans Allowance |  |  |  |  | 954,000 |  |  |
Provision for Loan and Lease Losses |  |  | 20,065,000 | 9,022,000 | $ 7,245,000 |  |  |
FDIC Indemnification Asset, Accretion of Discount | $ 0 |  |  |  |  |  |  |
Acquired Loans [Member] |  |  |  |  |  |  |  |
Non Covered Impaired Loans Allowance Reclassified |  |  | 954,000 | 954,000 |  |  |  |
Provision for Loan and Lease Losses |  |  | $ 626,000 | $ 736,000 |  |  |  |
Citizens National Bank [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  | $ 340,100,000 |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  | 348,800,000 |  |
Loans Acquired Discount |  |  |  |  |  | 8,700,000 |  |
Citizens National Bank [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  | 757,000 |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  | 1,600,000 |  |
Loans Acquired Discount |  |  |  |  |  | $ 848,000 |  |
Liberty Bancshares, Inc. [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  |  | $ 769,900,000 |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  |  | 774,800,000 |
Loans Acquired Discount |  |  |  |  |  |  | 4,900,000 |
Liberty Bancshares, Inc. [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  |  | 10,700,000 |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  |  | 15,700,000 |
Loans Acquired Discount |  |  |  |  |  |  | 5,000,000 |
Community First Bancshares Inc [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  |  | 1,130,000,000 |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  |  | 1,150,000,000 |
Loans Acquired Discount |  |  |  |  |  |  | 23,700,000 |
Community First Bancshares Inc [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  |  | 7,000,000 |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  |  | 10,100,000 |
Loans Acquired Discount |  |  |  |  |  |  | $ 3,100,000 |
Delta Trust [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  |  |  | $ 308,200,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  |  |  | 316,100,000
Loans Acquired Discount |  |  |  |  |  |  |  | 7,900,000
Delta Trust [Member] | Purchased Credit Impaired Loans [Member] |  |  |  |  |  |  |  |
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Not Covered By FDIC Loss Share |  |  |  |  |  |  |  | 3,500,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Other Noncurrent Assets Loans Acquired Gross |  |  |  |  |  |  |  | 10,700,000
Loans Acquired Discount |  |  |  |  |  |  |  | $ 7,200,000

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- Definition Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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