Note 12 - Selected Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information [Text Block]

12.       Selected Quarterly Financial Data (Unaudited)

	Fiscal Quarter
	First		Second		Third		Fourth
	(In thousands, except for per share data)
Year Ended December 31, 2012:
Operating revenue	$	80,674	$	94,691	$	102,879	$	126,587
Operating income		20,821		33,046		41,063		58,511
Net income (loss)		3,371		10,994		15,873		(2,109	)
Net income (loss) available to common stockholders		2,192		9,815		14,640		(2,613	)
Basic net income (loss) available to common stockholders per share	$	0.04	$	0.17	$	0.26	$	(0.05	)
Diluted net income (loss) available to common stockholders per share	$	0.04	$	0.17	$	0.26	$	(0.05	)

Year Ended December 31, 2011:
Operating revenue	$	69,742		$	76,201	$	76,518	$	84,670
Operating income		11,506			19,028		18,222		26,592
Net income (loss)		(3,083	)		2,559		1,984		7,575
Net income (loss) available to common stockholders		(4,872	)		771		27		5,869
Basic net (loss) income available to common stockholders per share	$	(0.09	)	$	0.01	$	-	$	0.10
Diluted net (loss) income available to common stockholders per share	$	(0.09	)	$	0.01	$	-	$	0.10

Because of the method used in calculating per share data, the sum of the quarterly per share data will not necessarily equal the per share data as computed for the year.