Acquisitions (Rangely Acquisition) (Narrative) (Details) - Predecessor - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Jun. 30, 2014	May 31, 2014	Dec. 31, 2016	Dec. 31, 2014
Business Acquisition [Line Items]
Net proceeds from senior note issuances				$ 170,596
Rangely Acquisition
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	25.00%
Business Acquisition, Cost of Acquired Entity, Cash Paid	$ 408,900
Partners' Capital Account, Units, Sale of Units	15,525,000	15,525,000
Business Acquisition, Effective Date of Acquisition	Apr. 01, 2014
Business Acquisition, Purchase Price Allocation, Methodology			Our Predecessor accounted for this transaction under the acquisition method of accounting. Accordingly, our Predecessor evaluated the identifiable assets acquired and liabilities assumed at their respective acquisition date fair values.
Business Acquisition, Purchase Price Allocation, Status			In conjunction with the issuance of common limited partner units associated with the acquisition, our Predecessor recorded $11.6 million of transaction fees, which were included with our Predecessor’s common limited partners’ interests for the year ended December 31, 2014 on our Predecessor’s consolidated balance sheet. All other costs associated with the acquisition of assets were expensed as incurred.
Business Acquisition, Cost of Acquired Entity, Transaction Costs				$ 11,600
Rangely Acquisition | 7.75% Senior Notes
Business Acquisition [Line Items]
Net proceeds from senior note issuances	$ 100,000
Debt Instrument, Interest Rate, Stated Percentage	7.75%