Supplemental Condensed Consolidating Financial Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidating Statements of Operations
Total revenue	$ 453,538	$ 420,516	$ 415,120	$ 373,273	$ 369,153	$ 280,576	$ 442,822	$ 347,263	$ 1,662,447	$ 1,439,814	$ 1,493,557
Operating expenses:
Purchased product costs									689,428	516,366	735,330
Facility expenses									293,938	208,232	165,017
Selling, general and administrative expenses									101,549	93,444	80,441
Depreciation and amortization									364,528	236,570	187,321
Other operating expenses (income)									(32,939)	6,926	9,982
Total operating expenses									1,416,504	1,061,538	1,178,091
Income from operations	34,495	7,763	140,022	63,663	61,450	8,593	257,741	50,492	245,943	378,276	315,466
Loss on redemption of debt				38,500					(38,455)		(78,996)
Other expense, net									(154,374)	(122,983)	(118,021)
Income before provision for income tax									53,114	255,293	118,449
Provision for income tax (benefit) expense									(12,669)	(38,328)	(13,649)
Net income	(3,895)	(20,027)	85,498	(21,131)	29,923	(15,265)	186,533	15,774	40,445	216,965	104,800
Net income attributable to non-controlling interest									(2,368)	3,437	(44,105)
Net income attributable to the Partnership's unitholders									38,077	220,402	60,695
Reportable legal entities | Parent
Operating expenses:
Selling, general and administrative expenses									46,732	48,949	46,903
Depreciation and amortization									847	607	719
Other operating expenses (income)										2	673
Total operating expenses									47,579	49,558	48,295
Income from operations									(47,579)	(49,558)	(48,295)
Earnings from consolidated affiliates									276,995	366,460	288,870
Loss on redemption of debt									(38,455)		(78,996)
Other expense, net									(161,975)	(118,563)	(91,612)
Income before provision for income tax									28,986	198,339	69,967
Provision for income tax (benefit) expense									(39)	(1,689)	(2,742)
Net income									28,947	196,650	67,225
Net income attributable to the Partnership's unitholders									28,947	196,650	67,225
Reportable legal entities | Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue									1,161,145	1,125,368	1,241,442
Operating expenses:
Purchased product costs									588,670	441,853	651,132
Facility expenses									148,492	137,261	128,612
Selling, general and administrative expenses									29,855	19,069	31,015
Depreciation and amortization									183,610	164,858	151,362
Other operating expenses (income)									4,907	4,341	9,030
Total operating expenses									955,534	767,382	971,151
Income from operations									205,611	357,986	270,291
Earnings from consolidated affiliates									110,763	66,114	43,172
Other expense, net									(26,749)	(21,001)	(13,686)
Income before provision for income tax									289,625	403,099	299,777
Provision for income tax (benefit) expense									(12,630)	(36,639)	(10,907)
Net income									276,995	366,460	288,870
Net income attributable to the Partnership's unitholders									276,995	366,460	288,870
Reportable legal entities | Non-Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue									550,181	324,738	252,115
Operating expenses:
Purchased product costs									100,758	74,513	84,198
Facility expenses									146,649	71,138	36,405
Selling, general and administrative expenses									32,512	29,674	7,450
Depreciation and amortization									185,810	75,599	35,948
Other operating expenses (income)									(39,926)	2,583	279
Total operating expenses									425,803	253,507	164,280
Income from operations									124,378	71,231	87,835
Other expense, net									(11,247)	(8,554)	(558)
Income before provision for income tax									113,131	62,677	87,277
Net income									113,131	62,677	87,277
Net income attributable to the Partnership's unitholders									113,131	62,677	87,277
Consolidating Adjustments
Condensed Consolidating Statements of Operations
Total revenue									(48,879)	(10,292)
Operating expenses:
Facility expenses									(1,203)	(167)
Selling, general and administrative expenses									(7,550)	(4,248)	(4,927)
Depreciation and amortization									(5,739)	(4,494)	(708)
Other operating expenses (income)									2,080
Total operating expenses									(12,412)	(8,909)	(5,635)
Income from operations									(36,467)	(1,383)	5,635
Earnings from consolidated affiliates									(387,758)	(432,574)	(332,042)
Other expense, net									45,597	25,135	(12,165)
Income before provision for income tax									(378,628)	(408,822)	(338,572)
Net income									(378,628)	(408,822)	(338,572)
Net income attributable to non-controlling interest									(2,368)	3,437	(44,105)
Net income attributable to the Partnership's unitholders									$ (380,996)	$ (405,385)	$ (382,677)