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Note 13 - Employee Benefits (Details) - Stocks Options Outstanding by Grant Date (USD $)				0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	May 12, 2004 Granted May 12, 2004 [Member]	Dec. 13, 2004 Granted December 13, 2004 [Member]	Dec. 14, 2005 Granted December 14, 2005 [Member]	Dec. 10, 2006 Granted December 10, 2006 [Member]	Apr. 19, 2007 Granted April 19, 2007 [Member]	May 16, 2007 Granted May 16, 2007 [Member]	Dec. 10, 2007 Granted December 10, 2007 [Member]	Jan. 02, 2008 Granted January 2, 2008 [Member]	Nov. 10, 2008 Granted November 10, 2008 [Member]	May 09, 2011 Granted May 19, 2011 [Member]
Note 13 - Employee Benefits (Details) - Stocks Options Outstanding by Grant Date [Line Items]
Exercise Price	$ 28.38	$ 27.25	$ 26.81	$ 27,350	$ 30,450	$ 36,730	$ 40,240	$ 37,330	$ 37,480	$ 37,000	$ 36,250	$ 23,000	$ 17,550
Shares Outstanding (in Shares)	58,581	79,693	88,774	907	11,223	7,163	3,150	3,639	1,337	2,450	1,337	18,500	8,875
Contractual Average Life				131 days	346 days	1 year 346 days	2 years 343 days	3 years 105 days	3 years 135 days	3 years 343 days	4 years	4 years 313 days	7 years 127 days
Average Exercise Price	$ 28.38	$ 27.25	$ 26.81	$ 27,350	$ 30,450	$ 36,730	$ 40,240	$ 37,330	$ 37,480	$ 37,000	$ 36,250	$ 23,000	$ 17,550
Shares Exercisable (in Shares)	58,581	79,693		907	11,223	7,163	3,150	3,639	1,337	2,450	1,337	18,500	8,875
Average Exercise Price	$ 28.38	$ 27.25		$ 27,350	$ 30,450	$ 36,730	$ 40,240	$ 37,730	$ 37,480	$ 37,000	$ 36,250	$ 23,000	$ 17,550

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Number of options outstanding, including both vested and non-vested options.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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