Note 14 - Stock-based Compensation (Details) - Summary of the Status of the 2012 Incentive Plan (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Summary of the Status of the 2012 Incentive Plan [Abstract]
Outstanding at beginning of year (in Shares)	4,710,000		3,563,000		2,934,000
Outstanding at beginning of year	$ 28.23		$ 30.09		$ 32.40
Outstanding at end of year (in Shares)	4,477,000		4,710,000		3,563,000
Outstanding at end of year	$ 27.48		$ 28.23		$ 30.09
Options and SARs exercisable at end of year (in Shares)	2,106,000		2,123,000		1,592,000
Options and SARs exercisable at end of year	$ 31.25		$ 33.82		$ 36.61
Weighted-average fair value of options and SARs granted during the year	$ 9.00		$ 6.66		$ 7.25
Granted, at fair value:
Stock Options (in Shares)	485,000		45,000		75,000
Stock Options	$ 29.05		$ 26.70		$ 19.01
SARs* (in Shares)		[1]	1,270,000	[1]	602,000	[1]
SARs*		[1]	$ 23.08	[1]	$ 20.13	[1]
Exercised (in Shares)	(243,000)		(39,000)		0
Exercised	$ 24.10		$ 16.89
Forfeited (in Shares)	(116,000)		(114,000)		(48,000)
Forfeited	$ 23.20		$ 30.04		$ 28.92
Expired (in Shares)	(359,000)		(15,000)
Expired	$ 42.70		$ 37.90

[1] Upon exercise, SARs entitle the recipient to receive shares of common stock equal to the increase in value of the award between the grant date and the exercise date.