v3.5.0.2
Investments - Equity Method Investments - Equity Method (Details)
6 Months Ended
Jun. 30, 2016
Rendezvous Gas Services, L.L.C.  
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest 78.00%
Three Rivers Gathering, L.L.C.  
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest 50.00%
Uintah Basin Field Services, L.L.C.  
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest 38.00%