Goodwill and Other Intangible Assets (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Goodwill [Line Items]
Goodwill, Amortization Period for Income Taxes	15 years
NGL Energy [Member]
Goodwill [Line Items]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 46,400
Glass Mountain Pipeline LLC [Member]
Goodwill [Line Items]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	31,000
Crude Transportation [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 9,488