Other Equity Interests (Details) (USD $)	6 Months Ended		3 Months Ended	6 Months Ended			0 Months Ended	1 Months Ended		1 Months Ended		6 Months Ended				6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Ohio Condensate	Jun. 30, 2014 Ohio Condensate	Jun. 30, 2014 EMG item	Dec. 31, 2013 Blackhawk Ohio Condensate	May 30, 2014 Summit Ohio Condensate	Jan. 31, 2014 Summit Ohio Condensate	Jun. 30, 2014 Summit Ohio Condensate	Jul. 31, 2014 Summit Ohio Condensate Subsequent events	May 30, 2014 Summit Ohio Condensate Maximum	Jun. 30, 2014 Utica Condensate item	Jun. 30, 2014 Utica Condensate Assets under construction	Jun. 30, 2014 Utica Condensate Ohio Condensate	Dec. 31, 2013 Utica Condensate Ohio Condensate	Jun. 30, 2014 Utica Condensate EMG
Other Equity Interests
Percentage of ownership interest held by non-controlling interest						1.00%			40.00%		1.00%	45.00%
Percentage of capital required by the reporting entity												100.00%				100.00%
Total capital contribution					$ 125,000,000											$ 100,000,000
Ownership percentage determined under required true up transaction												55.00%
Number of managers consisted in board of managers prior to the condensate equalization date					3							3
Percentage of ownership interest held by the parent														60.00%	99.00%
Equity interest acquired (as a percent)								1.00%
Additional equity interest acquired (as a percent)								40.00%
Cash investment received							7,300,000			1,300,000
Proceeds from sale of assets under construction	21,562,000	208,109,000											17,000,000
Management Fees revenue			$ 900,000	$ 1,300,000