Revenue from Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The tables below present oil, gas, and NGL production revenue by product type for each of the Company’s operating regions for the three and six months ended June 30, 2019, and 2018:

	Permian						South Texas & Gulf Coast						Rocky Mountain						Total
	Three Months Ended June 30,						Three Months Ended June 30,						Three Months Ended June 30,						Three Months Ended June 30,
	2019			2018			2019			2018			2019			2018			2019			2018
	(in thousands)
Oil production revenue	$	288,447		$	227,636		$	15,697		$	19,346		$	—		$	19,168		$	304,144		$	266,150
Gas production revenue	16,449			31,734			48,775			52,235			—			95			65,224			84,064
NGL production revenue	(43		)	129			37,529			52,248			—			(33		)	37,486			52,344
Total	$	304,853		$	259,499		$	102,001		$	123,829		$	—		$	19,230		$	406,854		$	402,558
Relative percentage	75		%	64		%	25		%	31		%	—		%	5		%	100		%	100		%

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Note: Amounts may not calculate due to rounding.

	Permian						South Texas & Gulf Coast						Rocky Mountain						Total
	Six Months Ended June 30,						Six Months Ended June 30,						Six Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018			2019			2018			2019			2018
	(in thousands)
Oil production revenue	$	513,694		$	433,430		$	29,511		$	38,929		$	—		$	54,851		$	543,205		$	527,210
Gas production revenue	32,041			56,611			98,296			104,968			—			1,594			130,337			163,173
NGL production revenue	(22		)	253			73,810			94,018			—			790			73,788			95,061
Total	$	545,713		$	490,294		$	201,617		$	237,915		$	—		$	57,235		$	747,330		$	785,444
Relative percentage	73		%	63		%	27		%	30		%	—		%	7		%	100		%	100		%

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Note: Amounts may not calculate due to rounding.