Variable Interest Entities (Details) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Nov. 22, 2016	Jul. 05, 2016	Jul. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Capital investments				$ 107,320
Earnings in Equity Investments				2,301
Distributions received				(2,950)	$ (47)
Estimated earnout accrued				4,270
Equity in equity investments				110,941
Guarantees of capital investments				17,584
Maximum exposure to loss				128,525
Carnero Processing Joint Venture
Variable Interest Entity [Line Items]
Ownership interest (as a percent)	50.00%
Payments to acquire interest in joint venture	$ 55,500
Assumption of capital commitments in joint venture	24,500			10,600
Capital investments	$ 48,000			66,000
Guarantees of capital investments				14,000
Maximum exposure to loss				80,000
Carnero Gathering LLC, Joint Venture
Variable Interest Entity [Line Items]
Ownership interest (as a percent)		50.00%	50.00%
Payments to acquire interest in joint venture		$ 37,000	$ 37,000
Assumption of capital commitments in joint venture		$ 7,400	$ 7,400	4,300
Debt incurred				0
Capital investments				40,300
Guarantees of capital investments				4,100
Maximum exposure to loss				$ 48,100