Acquisitions (Details) - USD ($)				3 Months Ended
	Oct. 14, 2015	Apr. 15, 2015	Mar. 31, 2015	Mar. 31, 2015
Business Acquisition [Line Items]
Proceeds from preferred units sold				$ 17,000,000
Eagle Ford [Member]
Business Acquisition [Line Items]
Initial purchase price			$ 85,000,000	85,000,000
Cash payment for acquisition			83,400,000
Purchase price			$ 84,299,000	$ 84,299,000
Western Catarina Midstream [Member]
Business Acquisition [Line Items]
Cash payment for acquisition	$ 345,800,000
Repurchase of units (in units)	105,263
Purchase price	$ 345,840,000
Class A Preferred [Member]
Business Acquisition [Line Items]
Price per unit sold		$ 1.60	$ 1.60	$ 1.60
Proceeds from preferred units sold		$ 375,000		$ 17,000,000
Class A Preferred [Member] | Eagle Ford [Member]
Business Acquisition [Line Items]
Shares issued			10,625,000
Price per unit sold			$ 1.60	$ 1.60
Proceeds from preferred units sold			$ 17,000,000
Common Units [Member] | Eagle Ford [Member]
Business Acquisition [Line Items]
Shares issued			105,263
Prior To Stock Split [Member] | Common Units [Member] | Eagle Ford [Member]
Business Acquisition [Line Items]
Shares issued			1,052,632