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Note 6 - Investment Securities Available For Sale (Detail) - Amortized Cost and Fair Values of Securities Available for Sale (USD $) | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Available for Sale Securities Amortized Cost | $ 184,224,000 | $ 186,305,000
Available for Sale Securities Gross Unrealized Gains | 7,100,000 | 8,427,000
Available for Sale Securities Gross Unrealized Losses | (637,000) | (260,000)
Available for Sale Securities Fair Value | 190,687,000 | 194,472,000
Taxable [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Available for Sale Securities Amortized Cost | 5,892,000 | 6,888,000
Available for Sale Securities Gross Unrealized Gains | 597,000 | 738,000
Available for Sale Securities Gross Unrealized Losses | 0 | 0
Available for Sale Securities Fair Value | 6,489,000 | 7,626,000
Tax-exempt [Member] | US States and Political Subdivisions Debt Securities [Member] |  |
Available for Sale Securities Amortized Cost | 84,379,000 | 80,391,000
Available for Sale Securities Gross Unrealized Gains | 3,985,000 | 4,683,000
Available for Sale Securities Gross Unrealized Losses | (391,000) | (104,000)
Available for Sale Securities Fair Value | 87,973,000 | 84,970,000
US Government Agencies Debt Securities [Member] |  |
Available for Sale Securities Amortized Cost | 25,277,000 | 24,485,000
Available for Sale Securities Gross Unrealized Gains | 556,000 | 566,000
Available for Sale Securities Gross Unrealized Losses | (81,000) | (91,000)
Available for Sale Securities Fair Value | 25,752,000 | 24,960,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available for Sale Securities Amortized Cost | 63,710,000 | 69,238,000
Available for Sale Securities Gross Unrealized Gains | 1,481,000 | 1,929,000
Available for Sale Securities Gross Unrealized Losses | (165,000) | (65,000)
Available for Sale Securities Fair Value | 65,026,000 | 71,102,000
Mortgage-backed Securities, Issued by Private Enterprises [Member] |  |
Available for Sale Securities Amortized Cost | 4,216,000 | 4,553,000
Available for Sale Securities Gross Unrealized Gains | 481,000 | 511,000
Available for Sale Securities Gross Unrealized Losses | 0 | 0
Available for Sale Securities Fair Value | 4,697,000 | 5,064,000
Debt Securities [Member] |  |
Available for Sale Securities Amortized Cost | 183,474,000 | 185,555,000
Available for Sale Securities Gross Unrealized Gains | 7,100,000 | 8,427,000
Available for Sale Securities Gross Unrealized Losses | (637,000) | (260,000)
Available for Sale Securities Fair Value | 189,937,000 | 193,722,000
Equity Securities in Financial Institutions [Member] |  |
Available for Sale Securities Amortized Cost | 750,000 | 750,000
Available for Sale Securities Gross Unrealized Gains | 0 | 0
Available for Sale Securities Gross Unrealized Losses | 0 | 0
Available for Sale Securities Fair Value | $ 750,000 | $ 750,000

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 15D -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 15C -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7534914&loc=d3e22054-111558 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 15E -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 14 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 7 -Footnote 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 13, 19 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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