Note 8 - Debt (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Note 8 - Debt (Details) [Line Items]
Debt Instrument, Term	5 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 225	$ 225
Line of Credit Facility, Expiration Date		Jan. 31, 2017
Line Of Credit Accordion Feature	100	100
Line of Credit Facility, Remaining Borrowing Capacity	164.1	164.1
Sub-Facility [Member]
Note 8 - Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	30	30
Standby Letters of Credit [Member]
Note 8 - Debt (Details) [Line Items]
Line of Credit Facility, Amount Outstanding	$ 10.8	$ 10.8