Note 4 - Investment Securities Available for Sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Note 4 - Investment Securities Available for Sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Available for sale securities, amortized cost	$ 231,706
Available for sale securities, fair value	227,079	264,502
State and Municipal [Member]
Note 4 - Investment Securities Available for Sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Due in one year or less, amortized cost	3,944
Due in one year or less, fair value	3,992
Due after one year through five years, amortized cost	2,989
Due after one year through five years, fair value	3,115
Due after five years through ten years, amortized cost	1,084
Due after five years through ten years, fair value	1,028
Due after ten years, amortized cost	0
Due after ten years, fair value	0
Available for sale securities, amortized cost	8,017
Available for sale securities, fair value	8,135	11,530
Collateralized Mortgage Obligations (Federal Agencies) [Member]
Note 4 - Investment Securities Available for Sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Due in one year or less, amortized cost	8,124
Due in one year or less, fair value	8,177
Due after one year through five years, amortized cost	15,715
Due after one year through five years, fair value	15,371
Due after five years through ten years, amortized cost	80,098
Due after five years through ten years, fair value	76,490
Due after ten years, amortized cost	0
Due after ten years, fair value	0
Available for sale securities, amortized cost	103,937
Available for sale securities, fair value	100,038	123,508
Other Mortgage-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available for Sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Due in one year or less, amortized cost	0
Due in one year or less, fair value	0
Due after one year through five years, amortized cost	47,699
Due after one year through five years, fair value	47,532
Due after five years through ten years, amortized cost	14,875
Due after five years through ten years, fair value	14,484
Due after ten years, amortized cost	18,173
Due after ten years, fair value	17,792
Available for sale securities, amortized cost	80,747
Available for sale securities, fair value	79,808	63,817
SBA Loan-Backed (Federal Agencies) [Member]
Note 4 - Investment Securities Available for Sale (Details) - Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale [Line Items]
Due in one year or less, amortized cost	0
Due in one year or less, fair value	0
Due after one year through five years, amortized cost	15,235
Due after one year through five years, fair value	15,176
Due after five years through ten years, amortized cost	14,507
Due after five years through ten years, fair value	14,499
Due after ten years, amortized cost	9,263
Due after ten years, fair value	9,423
Available for sale securities, amortized cost	39,005
Available for sale securities, fair value	$ 39,098	$ 65,647

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This item represents the cost of debt 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

No definition available.

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- 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 Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

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

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- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next rolling twelve months following the latest balance sheet presented. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References

No definition available.

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- Definition

Amount of available-for-sale debt securities at fair value maturing in the next rolling twelve months following the latest balance sheet presented.

+ References

No definition available.

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Amount of available-for-sale debt securities at cost, net of adjustments, maturing after the tenth rolling twelve months following the latest balance sheet presented. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References

No definition available.

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- Definition

Amount of available-for-sale debt securities at fair value maturing after the tenth rolling twelve months following the latest balance sheet presented.

+ References

No definition available.

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- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the sixth rolling twelve months through the tenth rolling twelve months following the latest balance sheet presented. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References

No definition available.

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Amount of available-for-sale debt securities at fair value maturing in the sixth rolling twelve months through the tenth rolling twelve months following the latest balance sheet presented.

+ References

No definition available.

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- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second rolling twelve months through the fifth rolling twelve months following the latest balance sheet presented. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

+ References

No definition available.

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Amount of available-for-sale debt securities at fair value maturing in the second rolling twelve months through the fifth rolling twelve months following the latest balance sheet presented.

+ References

No definition available.

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