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Note 6 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings - USD ($) | Jun. 30, 2015 | Apr. 30, 2015 | Dec. 31, 2014
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Note 6 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |  |
Other borrowings | $ 115,000,000 |  | $ 150,282,492
Wholesale Repurchase Agreements [Member] |  |  |
Note 6 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |  |
Other borrowings | $ 115,000,000 |  | 130,000,000
Term Note [Member] |  |  |
Note 6 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |  |
Other borrowings |  | $ 15,275,000 | 17,625,000
Series A Subordinated Notes [Member] |  |  |
Note 6 - Other Borrowings and Unused Lines of Credit (Details) - Other Borrowings [Line Items] |  |  |
Other borrowings |  |  | $ 2,657,492

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- Definition The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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