Note 9 - Options: Schedule of Share-based Compensation, Stock Options, Activity (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	28		39
Price Range Per Share Granted	58.50 - 58.50	- - -	49.18 - 50.72
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	3	7	4
Price Range Per Share Expired	49.18 - 49.18	26.58 - 49.18	25.59 - 49.18
Price Range Per Share Exercised	24.00 - 49.18	21.68 - 49.18	18.00 - 33.30
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	75	62	91
Price Range Per Share Outstanding	24.00 - 58.50	24.00 - 50.72	21.68 - 50.72
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	36	41	48
Price Range Per Share Total Exercisable	24.00 - 50.72	24.00 - 50.72	21.68 - 33.30
Common Stock
Common stock issued upon exercise of employee stock options, shares	13	22	35