Note 2 - Summary of Accounting Policies (Detail) - Earnings Per Share Calculation, Share Information	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted average number of common shares used for basic EPS	39,222,737	39,362,138	39,040,386
Effect of dilutive stock options, restricted stock and deferred stock units (Note 7)	313,654	336,317	373,494
Weighted average number of common shares and dilutive potential common stock used in diluted EPS	39,536,391	39,698,455	39,413,880

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

+ References+ Details

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details