Note 7 - Deferred Compensation and Long-term Incentive Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Note 7 - Deferred Compensation and Long-term Incentive Plans (Details) [Line Items]
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 2.1
Guaranteed Return	5.25%
Deferred Compensation Liability, Classified, Noncurrent	$ 8.5	$ 7.1
Minimum [Member]
Note 7 - Deferred Compensation and Long-term Incentive Plans (Details) [Line Items]
Deferred Compensation Arrangement with Individual, Requisite Service Period	1 year
Maximum [Member]
Note 7 - Deferred Compensation and Long-term Incentive Plans (Details) [Line Items]
Deferred Compensation Arrangement with Individual, Requisite Service Period	7 years