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Note 3 - Investment Securities (Details) - Gross Unrealized Losses and Fair value of Securities in a Continuous Unrealized Loss Position (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | $ 441,808,604 | $ 85,986,271
Available for Sale Securities less than 12 months gross unrealized losses | (22,813,786) | (350,027)
Available for Sale Securities 12 months or more fair value | 26,081,796 | 217,500
Available for Sale Securities 12 months or more gross unrealized losses | (1,941,536) | (23,469)
Available for Sale Securities fair value | 467,890,400 | 86,203,771
Available for Sale Securities gross unrealized losses | (24,755,322) | (373,496)
US States and Political Subdivisions Debt Securities [Member] |  |
Securities held to maturity: |  |
Held to Maturity Securities less than 12 months fair value | 101,983,602 | 4,282,352
Held to Maturity Securities less than 12 months gross unrealized losses | (6,711,240) | (71,648)
Held to Maturity Securities 12 months or more fair value | 2,697,375 |
Held to Maturity Securities 12 months or more gross unrealized losses | (400,339) |
Held to Maturity Securities fair value | 104,680,977 | 4,282,352
Held to Maturity Securities gross unrealized losses | (7,111,579) | (71,648)
Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | 13,890,692 | 1,039,625
Available for Sale Securities less than 12 months gross unrealized losses | (724,939) | (18,834)
Available for Sale Securities 12 months or more fair value | 985,687 |
Available for Sale Securities 12 months or more gross unrealized losses | (53,385) |
Available for Sale Securities fair value | 14,876,379 | 1,039,625
Available for Sale Securities gross unrealized losses | (778,324) | (18,834)
US Government Agencies Debt Securities [Member] |  |
Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | 333,194,820 | 55,621,718
Available for Sale Securities less than 12 months gross unrealized losses | (19,141,077) | (160,279)
Available for Sale Securities 12 months or more fair value | 10,978,390 | 0
Available for Sale Securities 12 months or more gross unrealized losses | (1,001,764) | 0
Available for Sale Securities fair value | 344,173,210 | 55,621,718
Available for Sale Securities gross unrealized losses | (20,142,841) | (160,279)
Residential Mortgage Backed Securities [Member] |  |
Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | 94,723,092 | 29,324,928
Available for Sale Securities less than 12 months gross unrealized losses | (2,947,770) | (170,914)
Available for Sale Securities 12 months or more fair value | 14,117,719 |
Available for Sale Securities 12 months or more gross unrealized losses | (886,387) |
Available for Sale Securities fair value | 108,840,811 | 29,324,928
Available for Sale Securities gross unrealized losses | (3,834,157) | (170,914)
Other Securities [Member] |  |
Securities available for sale: |  |
Available for Sale Securities 12 months or more fair value |  | 217,500
Available for Sale Securities 12 months or more gross unrealized losses |  | (23,469)
Available for Sale Securities fair value |  | 217,500
Available for Sale Securities gross unrealized losses |  | $ (23,469)

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- Definition Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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