Note 8 - Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

Fair Value at March 31, 2013	Level 1		Level 2			Level 3
Measured on a recurring basis:
Derivative contracts, net	$	-	$	(3,919	)	$	-

Fair Value at December 31, 2012	Level 1		Level 2			Level 3
Measured on a recurring basis:
Derivative contracts, net	$	-	$	(4,679	)	$	-

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]

	March 31,  2013		December 31, 2012
Carrying value	$	132,567	$	130,469
Fair value		134,883		134,688