Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Data (Unaudited)

Schedule of Quarterly Financial Data (Unaudited)

        Unaudited summarized financial data by quarter for 2014 and 2013 is as follows (in thousands, except per share data):

	Year Ended December 31, 2014
	First Quarter			Second Quarter			Third Quarter		Fourth Quarter			Year
Operating revenues	$	772,386		$	816,574		$	834,633	$	813,854		$	3,237,447
Operating income		(27,774	)		13,244			59,080		(19,702	)		24,848
Net income (loss)		(22,887	)		(14,737	)		41,338		(27,868	)		(24,154	)
Net income (loss) per common share:
Basic		(0.44	)		(0.29	)		0.81		(0.54	)		(0.47	)
Diluted		(0.44	)		(0.29	)		0.79		(0.54	)		(0.47	)
Weighted average common shares:
Basic:		51,467			51,183			51,127		51,174			51,237
Diluted:		51,467			51,183			52,036		51,174			51,237

	Year Ended December 31, 2013
	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Year
Operating revenues	$	803,487	$	839,130	$	850,740	$	804,368	$	3,297,725
Operating income		15,561		50,555		56,174		30,820		153,111
Net income (loss)		3,233		20,720		26,394		8,609		58,956
Net income (loss) per common share:
Basic		0.06		0.40		0.51		0.17		1.14
Diluted		0.06		0.39		0.50		0.17		1.12
Weighted average common shares:
Basic:		51,763		51,881		51,881		51,228		51,688
Diluted:		52,497		52,547		52,610		52,034		52,422