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Note 2 - Acquisitions (Details Textual) $ in Thousands | May 15, 2017 USD ($) shares | Sep. 09, 2016 USD ($) shares | Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
--- | --- | --- | --- | ---
Goodwill |  |  | $ 375,731 | $ 348,505
Hardeman County Investment Company, Inc. [Member] |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares | 799,970 |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned | $ 42,600 |  |  |
Payments to Acquire Businesses, Gross | $ 30,000 |  |  |
Number of Bank Branches | 10 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | $ 462,893 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans | 251,649 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits | 388,976 |  |  |
Goodwill | $ 29,402 |  |  |
Citizens National Bank [Member] |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares |  | 835,741 |  |
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned |  | $ 41,300 |  |
Payments to Acquire Businesses, Gross |  | $ 35,000 |  |
Number of Bank Branches |  | 9 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  | $ 585,149 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans |  | 340,850 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Total Deposits |  | 509,857 |  |
Goodwill |  | 23,376 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Acquired Not Covered by FDIC Loss Share |  | $ 340,900 |  |

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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