Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table summarizes our revenues by product type for the years ended December 31, 2018, 2017 and 2016:

	Year Ended December 31,
In thousands	2018		2017		2016
Oil sales	$	1,412,358	$	1,079,703	$	924,618
Natural gas sales	10,231		9,963		11,133
CO2 sales and transportation fees	31,145		26,182		24,816
	$	1,453,734	$	1,115,848	$	960,567