Note 2 - Accounting Policies (Details) - Financial Data for Earnings Per Share	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Weighted average number of common shares used for basic EPS	38,692,658	39,222,737	39,362,138
Effect of dilutive stock options and restricted and deferred stock unit awards	389,684	313,654	336,317
Weighted average number of common shares and dilutive potential common stock used in dilutive EPS	39,082,342	39,536,391	39,698,455
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	318,026	223,536	189,202