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Note 2 - Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

		2013				Weighted- average Exercise Price				2012				Weighted- average Exercise Price
Outstanding, January 1			79,693			$	27.25				88,774			$	26.81
Exercised			18,561				24.08				-				-
Outstanding, March 31			61,132			$	28.21				88,774			$	26.81
Exercisable, March 31			61,132			$	28.21				88,774			$	26.81

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ 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)

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

+ Details

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Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration