Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The table below presents oil, gas, and NGL production revenue by product type for each of the Company’s operating regions for the three months ended March 31, 2019, and 2018:

	Permian						South Texas & Gulf Coast						Rocky Mountain						Total
	Three Months Ended March 31,						Three Months Ended March 31,						Three Months Ended March 31,						Three Months Ended March 31,
	2019			2018			2019			2018			2019			2018			2019			2018
	(in thousands)
Oil production revenue	$	225,247		$	205,794		$	13,814		$	19,583		$	—		$	35,683		$	239,061		$	261,060
Gas production revenue	15,592			24,876			49,521			52,733			—			1,500			65,113			79,109
NGL production revenue	21			124			36,281			41,770			—			823			36,302			42,717
Total	$	240,860		$	230,794		$	99,616		$	114,086		$	—		$	38,006		$	340,476		$	382,886
Relative percentage	71		%	60		%	29		%	30		%	—		%	10		%	100		%	100		%

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Note: Amounts may not calculate due to rounding.