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Note 2 - Investment Securities (Details) - Gross Unrealized Losses and Fair Value of Securities in a Continuous Unrealized Loss Position (USD $) | Jun. 30, 2014 | Dec. 31, 2013
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Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | $ 301,061,298 | $ 441,808,604
Available for Sale Securities less than 12 months gross unrealized losses | (8,728,921) | (22,813,786)
Available for Sale Securities 12 months or more fair value | 71,709,707 | 26,081,796
Available for Sale Securities 12 months or more gross unrealized losses | (1,284,182) | (1,941,536)
Available for Sale Securities fair value | 372,771,005 | 467,890,400
Available for Sale Securities gross unrealized losses | (10,013,103) | (24,755,322)
US States and Political Subdivisions Debt Securities [Member] |  |
Securities held to maturity: |  |
Held to Maturity Securities less than 12 months fair value | 37,351,435 | 101,983,602
Held to Maturity Securities less than 12 months gross unrealized losses | (982,726) | (6,711,240)
Held to Maturity Securities 12 months or more fair value | 47,726,709 | 2,697,375
Held to Maturity Securities 12 months or more gross unrealized losses | (1,626,902) | (400,339)
Held to Maturity Securities fair value | 85,078,144 | 104,680,977
Held to Maturity Securities gross unrealized losses | (2,609,628) | (7,111,579)
Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | 8,765,260 | 13,890,692
Available for Sale Securities less than 12 months gross unrealized losses | (131,548) | (724,939)
Available for Sale Securities 12 months or more fair value | 2,184,122 | 985,687
Available for Sale Securities 12 months or more gross unrealized losses | (38,456) | (53,385)
Available for Sale Securities fair value | 10,949,382 | 14,876,379
Available for Sale Securities gross unrealized losses | (170,004) | (778,324)
US Government Agencies Debt Securities [Member] |  |
Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | 284,171,721 | 333,194,820
Available for Sale Securities less than 12 months gross unrealized losses | (8,502,103) | (19,141,077)
Available for Sale Securities 12 months or more fair value | 13,725,024 | 10,978,390
Available for Sale Securities 12 months or more gross unrealized losses | (70,838) | (1,001,764)
Available for Sale Securities fair value | 297,896,745 | 344,173,210
Available for Sale Securities gross unrealized losses | (8,572,941) | (20,142,841)
Residential Mortgage Backed Securities [Member] |  |
Securities available for sale: |  |
Available for Sale Securities less than 12 months fair value | 8,124,317 | 94,723,092
Available for Sale Securities less than 12 months gross unrealized losses | (95,270) | (2,947,770)
Available for Sale Securities 12 months or more fair value | 55,800,561 | 14,117,719
Available for Sale Securities 12 months or more gross unrealized losses | (1,174,888) | (886,387)
Available for Sale Securities fair value | 63,924,878 | 108,840,811
Available for Sale Securities gross unrealized losses | $ (1,270,158) | $ (3,834,157)

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous 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 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: 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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