Revenue Recognition Revenue by Commodity and Location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue from Contract with Customer, Excluding Assessed Tax	$ 325,933	$ 213,602	$ 631,158	$ 403,294
Revenue year over year percentage change [Line Items]		52.60%	56.50%
Utica Shale [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	$ 5,643	$ 4,645	13,262
Revenue year over year percentage change [Line Items]		(100.00%)	(65.00%)
Delaware Basin [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	83,030	$ 22,774	$ 154,761	41,727
Revenue year over year percentage change [Line Items]		264.60%	270.90%
Wattenberg Field
Revenue from Contract with Customer, Excluding Assessed Tax	242,903	$ 185,185	$ 471,752	348,305
Revenue year over year percentage change [Line Items]		31.20%	35.40%
NGL [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	43,230	$ 26,469	$ 83,475	56,223
Revenue year over year percentage change [Line Items]		63.30%	48.50%
NGL [Member] | Wattenberg Field
Revenue from Contract with Customer, Excluding Assessed Tax	30,271	$ 21,923	$ 59,041	47,242
Revenue year over year percentage change [Line Items]		38.10%	25.00%
NGL [Member] | Delaware Basin [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	12,959	$ 3,680	$ 23,594	6,626
Revenue year over year percentage change [Line Items]		252.10%	256.10%
NGL [Member] | Utica Shale [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	$ 866	$ 840	2,355
Revenue year over year percentage change [Line Items]		(100.00%)	(64.30%)
Natural Gas [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	30,112	$ 38,332	$ 68,672	75,274
Revenue year over year percentage change [Line Items]		(21.40%)	(8.80%)
Natural Gas [Member] | Wattenberg Field
Revenue from Contract with Customer, Excluding Assessed Tax	22,640	$ 34,004	$ 52,412	66,617
Revenue year over year percentage change [Line Items]		(33.40%)	(21.30%)
Natural Gas [Member] | Delaware Basin [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	7,472	$ 2,767	$ 15,151	5,236
Revenue year over year percentage change [Line Items]		170.00%	189.40%
Natural Gas [Member] | Utica Shale [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	$ 1,561	$ 1,109	3,421
Revenue year over year percentage change [Line Items]		(100.00%)	(67.60%)
Crude Oil [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	252,591	$ 148,801	$ 479,011	271,797
Revenue year over year percentage change [Line Items]		69.80%	76.20%
Crude Oil [Member] | Wattenberg Field
Revenue from Contract with Customer, Excluding Assessed Tax	189,992	$ 129,258	$ 360,299	234,446
Revenue year over year percentage change [Line Items]		47.00%	53.70%
Crude Oil [Member] | Delaware Basin [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	62,599	$ 16,327	$ 116,016	29,865
Revenue year over year percentage change [Line Items]		283.40%	288.50%
Crude Oil [Member] | Utica Shale [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0	$ 3,216	$ 2,696	$ 7,486
Revenue year over year percentage change [Line Items]		(100.00%)	(64.00%)