Note 15 - Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended		9 Months Ended		0 Months Ended
	Aug. 06, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Nov. 05, 2013 Subsequent Event [Member]	Oct. 16, 2013 Subsequent Event [Member] MMBTU bbl
Note 15 - Subsequent Events (Details) [Line Items]
Derivative, Nonmonetary Notional Amount, Energy Measure (in Millions of British Thermal Units)							4,200,000
Underlying, Derivative Energy Measure (in Dollars per Million British Thermal Units)							4.103
Derivative, Nonmonetary Notional Amount, Volume							275,000
Underlying, Derivative Volume (in Dollars per Barrel (of Oil))							125.15
Dividends, Common Stock (in Dollars)	$ 1.8					$ 1.8
Common Stock, Dividends, Per Share, Declared (in Dollars per share)	$ 0.04	$ 0.04	$ 0.04	$ 0.08	$ 0.08	$ 0.04