CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (Unaudited) - USD ($) $ in Thousands	Total	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	Limited Partners
Beginning balance at Dec. 31, 2014	$ 3,940,596	$ (115,288)	$ 237,968	$ 3,817,916
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	302,437		(794)	303,231
Acquisition of additional interest in Buckeye Memphis	(10,044)		(1,768)	(8,276)
Adjusted value of noncontrolling interest in acquisition	(1,220)		(1,220)
Distributions paid to unitholders	(439,578)		2,379	(441,957)
Net proceeds from issuance of LP Units	117,820			117,820
Amortization of unit-based compensation awards	17,764			17,764
Net proceeds from exercise of LP Unit options	173			173
Payment of tax withholding on issuance of LTIP awards	(6,667)			(6,667)
Distributions paid to noncontrolling interests	(8,348)		(8,348)
Contributions from noncontrolling interests	44,000		44,000
Other comprehensive income	17,656	17,656
Noncash accrual for distribution equivalent rights	(1,944)			(1,944)
Other	56		(106)	162
Ending balance at Sep. 30, 2015	3,972,701	(97,632)	272,111	3,798,222
Beginning balance at Dec. 31, 2015	4,016,741	(97,841)	281,352	3,833,230
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	439,746		11,803	427,943
Distributions paid to unitholders	(469,764)		2,292	(472,056)
Net proceeds from issuance of LP Units	108,422			108,422
Amortization of unit-based compensation awards	22,977			22,977
Net proceeds from exercise of LP Unit options	300			300
Payment of tax withholding on issuance of LTIP awards	(5,123)			(5,123)
Distributions paid to noncontrolling interests	(11,531)		(11,531)
Contributions from noncontrolling interests	3,760		3,760
Other comprehensive income	9,654	9,654
Noncash accrual for distribution equivalent rights	(2,248)			(2,248)
Other	0		44	(44)
Ending balance at Sep. 30, 2016	$ 4,112,934	$ (88,187)	$ 287,720	$ 3,913,401