Variable Interest Entities (Details) - USD ($) $ in Thousands			6 Months Ended	7 Months Ended	12 Months Ended		24 Months Ended
	Nov. 22, 2016	Jul. 05, 2016	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2017	Nov. 30, 2016
Variable Interest Entity [Line Items]
Capital investments			$ 115,606	$ 115,606	$ 115,606	$ 107,320	$ 115,606
Earnings in equity investments			3,934	3,934	3,934	2,301	3,934
Distributions received			(6,600)			(2,950)
Estimated earnout accrued			4,049	4,049	4,049	4,270	4,049
Equity in equity investments			116,989	116,989	116,989	110,941	116,989
Guarantees of capital investments			9,986	9,986	9,986	17,584	9,986
Maximum exposure to loss			126,975	126,975	126,975	$ 128,525	126,975
Carnero Processing Joint Venture
Variable Interest Entity [Line Items]
Ownership interest (as a percent)	50.00%							50.00%
Payments to acquire interest in joint venture	$ 55,500			14,100
Assumption of capital commitments in joint venture	24,500
Debt incurred			0	0	0		0
Capital investments	$ 48,000		70,000	70,000	70,000		70,000
Maximum exposure to loss			79,300	79,300	79,300		79,300
Carnero Gathering LLC, Joint Venture
Variable Interest Entity [Line Items]
Ownership interest (as a percent)		50.00%
Payments to acquire interest in joint venture		$ 37,000	4,800		8,100		8,100
Assumption of capital commitments in joint venture		$ 7,400
Debt incurred			0	0	0		0
Capital investments			45,600	45,600	45,600		45,600
Maximum exposure to loss			$ 47,600	$ 47,600	$ 47,600		$ 47,600