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Note 3 - Earnings Per Share (Detail) (USD $)	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	90,528	88,354	88,354	90,528	88,774	89,077
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 17.55		$ 17.55
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit			$ 40.24	$ 40.24
Incremental Common Shares Attributable to Share-based Payment Arrangements (in Shares)		5,682	4,236
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)			17,536	90,528
Earnings Per Share, Potentially Dilutive Securities			11,332
Share Price (in Dollars per share)		$ 16	$ 16
Dilutive Securities [Member]
Incremental Common Shares Attributable to Share-based Payment Arrangements (in Shares)			9,000
Quarter Ended [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased	$ 17.23	$ 22.85	$ 22.85	$ 17.23
Year-to-Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased	$ 17.36	$ 21.08	$ 21.08	$ 17.36

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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