Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

(14) QUARTERLY FINANCIAL DATA (UNAUDITED)

The condensed quarterly results of operations for the years ended December 31, 2014 and 2013 (in thousands of dollars, except per share data) are as follows:

	Quarter Ended
	March 31,			June 30,			September 30,			December 31,
	2014			2014			2014			2014
	(Thousands of dollars, except per share data)
Operating revenues, net	$	197,071		$	212,145		$	216,294		$	210,760
Gain (loss) on disposition of assets, net		(1,073	)		(242	)		(56	)		523
Earnings (loss) before income taxes		(8,513	)		21,700			28,277			11,651
Net earnings (loss)		(5,321	)		13,368			17,249			7,392
Net earnings (loss) per share
Basic		(0.34	)		0.86			1.11			0.48
Diluted		(0.34	)		0.85			1.10			0.47

	Quarter Ended
	March 31,		June 30,			September 30,			December 31,
	2013		2013			2013			2013
	(Thousands of dollars, except per share data)
Operating revenues	$	178,968	$	195,543		$	200,762		$	281,227
Gain (loss) on disposition of assets, net		25		(14,701	)		(1,399	)		(529	)
Earnings before income taxes		14,730		32,525			24,212			18,674
Net earnings		8,838		19,516			13,777			16,825
Net earnings per share
Basic		0.57		1.26			0.89			1.09
Diluted		0.57		1.25			0.88			1.07