Basis of Presentation (Details) (USD $)	3 Months Ended									3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2013 Depreciation and amortization [Member]	Mar. 31, 2013 Other expense, net [Member]	Mar. 31, 2013 Total operating costs and expenses [Member]	Mar. 31, 2013 Operating Income [Member]	Mar. 31, 2013 Net Income [Member]	Mar. 31, 2014 Cardinal Pipeline Company, LLC [Member]	Dec. 31, 2013 Cardinal Pipeline Company, LLC [Member]	Mar. 31, 2014 Pine Needle LNG Company, LLC [Member]	Dec. 31, 2013 Pine Needle LNG Company, LLC [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Parent, total parent ownership percentage	66.00%
Parent, limited partner ownership percentage	64.00%
Parent, general partner ownership percentage	2.00%
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage								45.00%	45.00%	35.00%	35.00%
Equity method investment, distributions	$ 2,300,000	$ 2,200,000
Equity method investment, return of capital	301,000	0								300,000
Prior Period Reclassification Adjustment [Line Items]
Prior period reclassification adjustment			$ 9,000,000	$ (9,000,000)	$ 0	$ 0	$ 0