Revenues (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block]

The following table reflects the change in presentation of revenues and applicable expenses on the Company's 2018 results under the new and previous guidance.

	Three months ended September 30, 2018								Nine months ended September 30, 2018
In thousands	New Standard			Prior Presentation			Change		New Standard			Prior Presentation			Change
Revenues:
Crude oil and natural gas sales	$	1,273,238		$	1,227,230		$	46,008	$	3,524,618		$	3,382,059		$	142,559
Loss on natural gas derivatives, net	(2,025		)	(2,025		)	—		(4,536		)	(4,536		)	—
Crude oil and natural gas service operations	10,938			10,938			—		40,210			40,210			—
Total revenues	$	1,282,151		$	1,236,143		$	46,008	$	3,560,292		$	3,417,733		$	142,559
Operating costs and expenses:
Transportation expenses	$	46,008		$	—		$	46,008	$	142,559		$	—		$	142,559
Net income	$	314,169		$	314,169		$	—	$	790,580		$	790,580		$	—

Disaggregation of Revenue [Table Text Block]

The following table presents the disaggregation of the Company's crude oil and natural gas revenues for the three and nine months ended September 30, 2018.

	Three months ended September 30, 2018						Nine months ended September 30, 2018
In thousands	North Region		South Region		Total		North Region		South Region		Total
Crude oil revenues:
Operated properties	$	634,251	$	159,506	$	793,757	$	1,791,045	$	443,562	$	2,234,607
Non-operated properties	225,513		19,288		244,801		604,700		52,415		657,115
Total crude oil revenues	859,764		178,794		1,038,558		2,395,745		495,977		2,891,722
Natural gas revenues:
Operated properties	60,381		140,168		200,549		153,627		388,610		542,237
Non-operated properties	16,397		17,734		34,131		44,058		46,601		90,659
Total natural gas revenues	76,778		157,902		234,680		197,685		435,211		632,896
Crude oil and natural gas sales	$	936,542	$	336,696	$	1,273,238	$	2,593,430	$	931,188	$	3,524,618
Timing of revenue recognition
Goods transferred at a point in time	$	936,542	$	336,696	$	1,273,238	$	2,593,430	$	931,188	$	3,524,618
Goods transferred over time	—		—		—		—		—		—
	$	936,542	$	336,696	$	1,273,238	$	2,593,430	$	931,188	$	3,524,618