Note 11 - Derivative Financial Instruments (Details) - Amount of Gain (Loss) on Derivative Instruments Recognized in Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Amount of Gain (Loss) on Derivative Instruments Recognized in Income [Abstract]
Realized derivative gain (loss)	$ (816)	$ (715)	$ (2,713)	$ (715)
Unrealized derivative gain (loss)	359	(3,615)	2,985	(1,576)
Total gain (loss) on derivative financial instruments	$ (457)	$ (4,330)	$ 272	$ (2,291)