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Note 3 - Investment Securities Available for Sale (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Note 3 - Investment Securities Available for Sale (Details) [Line Items]
Debt Securities Weighted Average Duration	4 years 36 days
Federal Home Loan Bank Stock and Federal Reserve Bank Stock (in Dollars)	$ 10,599,000	$ 11,272,000	$ 11,154,000
Available-for-sale Securities Pledged as Collateral (in Dollars)	$ 276,200,000
Percent Of Shareholders' Equity	10.00%	10.00%
Debt Securities [Member] | Investment Securities Concentration Risk [Member] | Total Investment Securities [Member]
Note 3 - Investment Securities Available for Sale (Details) [Line Items]
Concentration Risk, Percentage	99.90%

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- Definition

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- Definition

No authoritative reference available.

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No definition available.

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- Definition

The fair value of available-for-sale securities that serve as collateral for borrowings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5086-111524

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

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