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Goodwill and Intangible Assets (Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill activity
Balance at beginning	$ 216,692	$ 240,782
Goodwill acquired during the year		5,806
Goodwill impairment	(15,456)	(29,896)	$ 0
Disposals		(29,896)
Balance at end	201,236	216,692	240,782
Crude oil pipelines and storage
Goodwill activity
Balance at beginning	124,710	148,284
Disposals		(23,574)
Balance at end	124,710	124,710	148,284
Refined products terminals and storage
Goodwill activity
Balance at beginning	61,163	61,163
Balance at end	61,163	61,163	61,163
NGL distribution and sales
Goodwill activity
Balance at beginning	30,819	31,335
Goodwill acquired during the year		5,806
Goodwill impairment	(15,456)
Disposals		(6,322)
Balance at end	15,363	30,819	31,335
Pinnacle Propane Express Reporting Unit And JP Liquids
Goodwill activity
Goodwill impairment	$ (15,456,000,000)
Crude Oil Supply and Logistics and JP Liquids
Goodwill activity
Goodwill impairment		(29,896)
Crude Oil Supply and Logistics \| Crude oil pipelines and storage
Goodwill activity
Goodwill impairment		(23,574)
Held-for-sale \| Mid-Continent Business
Goodwill activity
Goodwill impairment		(7,939)
Disposed of by Sale \| Bakken Business
Goodwill activity
Disposals		$ (1,984)	$ (1,984)