SUMMARIZED QUARTERLY FINANCIAL INFORMATION - UNAUDITED (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Results of Operations by Quarter

The results of operations by quarter are as follows:

	2014 Quarter Ended
	March 31		June 30		September 30			December 31
Operating revenue		$223,830		$207,046		$183,213			$184,780
Income (loss) from operations		48,552		16,613		(34,356	) (a)		(286,147) (b)
Net income (loss)		25,943		4,444		(29,415	) (a)		(190,515) (b)
Basic earnings (loss) per share		$0.52		$0.08		($0.54	)		($3.47)
Diluted earnings (loss) per share		$0.52		$0.08		($0.54	)		($3.47)

	2013 Quarter Ended
	March 31		June 30		September 30		December 31
Operating revenue		$233,732		$245,877		$256,685		$239,253
Income from operations		72,828		69,525		62,422		37,206 (c)
Net income		40,758		39,022		36,102		1,752 (c)	(d)
Basic earnings per share		$0.82		$0.78		$0.72		$0.04
Diluted earnings per share		$0.82		$0.78		$0.72		$0.04

(a) Includes a write-down of oil and gas properties of $47,130 before income tax effect ($30,163 net of income tax effect).

(b) Includes a write-down of oil and gas properties of $304,062 before income tax effect ($194,600 net of income tax effect).

(c) Includes franchise tax settlement of $12,590 before income tax effect ($8,058 net of income tax effect).

(d) Includes loss on early extinguishment of debt of $27,279 before income tax effect ($17,459 net of income tax effect).