Supplemental Condensed Consolidating Financial Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidating Statements of Operations
Total revenue	$ 420,516	$ 280,576	$ 1,208,909	$ 1,070,661
Operating expenses:
Purchased product costs	211,906	131,012	488,686	365,519
Facility expenses	79,874	56,911	202,649	150,574
Selling, general and administrative expenses	26,647	21,723	77,388	68,471
Depreciation and amortization	92,326	61,542	263,827	165,752
Other operating expenses (income)	2,000	795	(35,089)	3,519
Total operating expenses	412,753	271,983	997,461	753,835
Income from operations	7,763	8,593	211,448	316,826
Loss on redemption of debt			(38,455)
Other (expense) income, net	(38,046)	(31,278)	(116,069)	(88,186)
(Loss) income before provision for income tax	(30,283)	(22,685)	56,924	228,640
Provision for income tax (benefit) expense	(10,256)	(7,420)	12,584	41,598
Net (loss) income	(20,027)	(15,265)	44,340	187,042
Net income attributable to non-controlling interest	(3,577)	925	297	1,546
Net (loss) income attributable to the Partnership's unitholders	(23,604)	(14,340)	44,637	188,588
Reportable legal entities | Parent
Operating expenses:
Selling, general and administrative expenses	12,297	10,241	36,405	37,197
Depreciation and amortization	155	146	674	458
Total operating expenses	12,452	10,387	37,079	37,655
Income from operations	(12,452)	(10,387)	(37,079)	(37,655)
Earnings from consolidated affiliates	22,899	20,122	225,773	294,036
Loss on redemption of debt			(38,455)
Other (expense) income, net	(38,339)	(24,637)	(121,441)	(68,681)
(Loss) income before provision for income tax	(27,892)	(14,902)	28,798	187,700
Provision for income tax (benefit) expense	(7)	(31)	154	734
Net (loss) income	(27,885)	(14,871)	28,644	186,966
Net (loss) income attributable to the Partnership's unitholders	(27,885)	(14,871)	28,644	186,966
Reportable legal entities | Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue	277,120	205,629	846,185	858,227
Operating expenses:
Purchased product costs	174,754	114,685	415,517	316,327
Facility expenses	39,781	36,437	106,556	103,484
Selling, general and administrative expenses	7,900	5,633	21,519	13,333
Depreciation and amortization	45,898	41,593	135,408	121,520
Other operating expenses (income)	1,970	488	3,308	2,227
Total operating expenses	270,303	198,836	682,308	556,891
Income from operations	6,817	6,793	163,877	301,336
Earnings from consolidated affiliates	12,229	10,387	93,958	48,134
Other (expense) income, net	(6,396)	(4,447)	(19,632)	(14,570)
(Loss) income before provision for income tax	12,650	12,733	238,203	334,900
Provision for income tax (benefit) expense	(10,249)	(7,389)	12,430	40,864
Net (loss) income	22,899	20,122	225,773	294,036
Net (loss) income attributable to the Partnership's unitholders	22,899	20,122	225,773	294,036
Reportable legal entities | Non-Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue	152,225	78,047	388,082	217,257
Operating expenses:
Purchased product costs	37,152	16,327	73,169	49,192
Facility expenses	40,598	20,475	96,985	47,248
Selling, general and administrative expenses	8,077	6,943	23,605	20,697
Depreciation and amortization	47,570	21,381	131,865	46,719
Other operating expenses (income)	30	307	(40,477)	1,292
Total operating expenses	133,427	65,433	285,147	165,148
Income from operations	18,798	12,614	102,935	52,109
Other (expense) income, net	(2,992)	(3,152)	(9,274)	(5,521)
(Loss) income before provision for income tax	15,806	9,462	93,661	46,588
Net (loss) income	15,806	9,462	93,661	46,588
Net (loss) income attributable to the Partnership's unitholders	15,806	9,462	93,661	46,588
Consolidating Adjustments
Condensed Consolidating Statements of Operations
Total revenue	(8,829)	(3,100)	(25,358)	(4,823)
Operating expenses:
Facility expenses	(505)	(1)	(892)	(158)
Selling, general and administrative expenses	(1,627)	(1,094)	(4,141)	(2,756)
Depreciation and amortization	(1,297)	(1,578)	(4,120)	(2,945)
Other operating expenses (income)			2,080
Total operating expenses	(3,429)	(2,673)	(7,073)	(5,859)
Income from operations	(5,400)	(427)	(18,285)	1,036
Earnings from consolidated affiliates	(35,128)	(30,509)	(319,731)	(342,170)
Other (expense) income, net	9,681	958	34,278	586
(Loss) income before provision for income tax	(30,847)	(29,978)	(303,738)	(340,548)
Net (loss) income	(30,847)	(29,978)	(303,738)	(340,548)
Net income attributable to non-controlling interest	(3,577)	925	297	1,546
Net (loss) income attributable to the Partnership's unitholders	$ (34,424)	$ (29,053)	$ (303,441)	$ (339,002)