Supplemental Condensed Consolidating Financial Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidating Statements of Operations
Total revenue	$ 375,952	$ 350,466
Operating expenses:
Purchased product costs	141,853	173,355
Facility expenses	59,423	47,094
Selling, general and administrative expenses	25,408	25,224
Depreciation and amortization	84,427	52,130
Other operating expenses (income)	491	1,224
Total operating expenses	311,602	299,027
(Loss) income from operations	64,350	51,439
Loss on redemption of debt	(38,455)
Other expense, net	(40,102)	(30,621)
(Loss) income before provision for income tax	(14,207)	20,818
Provision for income tax (benefit) expense	6,557	4,545
Net (loss) income	(20,764)	16,273
Net (income) loss attributable to non-controlling interest	5,304	(253)
Net (loss) income attributable to the Partnership's unitholders	(15,460)	16,020
Parent
Operating expenses:
Selling, general and administrative expenses	12,034	14,417
Depreciation and amortization	277	164
Total operating expenses	12,311	14,581
(Loss) income from operations	(12,311)	(14,581)
Earnings from consolidated affiliates	69,961	56,431
Loss on redemption of debt	(38,455)
Other expense, net	(43,000)	(23,344)
(Loss) income before provision for income tax	(23,805)	18,506
Provision for income tax (benefit) expense	(133)	66
Net (loss) income	(23,672)	18,440
Net (loss) income attributable to the Partnership's unitholders	(23,672)	18,440
Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue	270,968	271,071
Operating expenses:
Purchased product costs	122,950	148,601
Facility expenses	32,278	33,936
Selling, general and administrative expenses	6,973	9,048
Depreciation and amortization	44,053	39,293
Other operating expenses (income)	765	1,111
Total operating expenses	207,019	231,989
(Loss) income from operations	63,949	39,082
Earnings from consolidated affiliates	19,438	24,234
Other expense, net	(6,736)	(2,406)
(Loss) income before provision for income tax	76,651	60,910
Provision for income tax (benefit) expense	6,690	4,479
Net (loss) income	69,961	56,431
Net (loss) income attributable to the Partnership's unitholders	69,961	56,431
Non-Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue	112,422	79,395
Operating expenses:
Purchased product costs	18,903	24,754
Facility expenses	27,336	13,334
Selling, general and administrative expenses	7,454	3,131
Depreciation and amortization	41,584	12,911
Other operating expenses (income)	(274)	113
Total operating expenses	95,003	54,243
(Loss) income from operations	17,419	25,152
Other expense, net	(3,285)	(665)
(Loss) income before provision for income tax	14,134	24,487
Net (loss) income	14,134	24,487
Net (loss) income attributable to the Partnership's unitholders	14,134	24,487
Consolidating Adjustments
Condensed Consolidating Statements of Operations
Total revenue	(7,438)
Operating expenses:
Facility expenses	(191)	(176)
Selling, general and administrative expenses	(1,053)	(1,372)
Depreciation and amortization	(1,487)	(238)
Total operating expenses	(2,731)	(1,786)
(Loss) income from operations	(4,707)	1,786
Earnings from consolidated affiliates	(89,399)	(80,665)
Other expense, net	12,919	(4,206)
(Loss) income before provision for income tax	(81,187)	(83,085)
Net (loss) income	(81,187)	(83,085)
Net (income) loss attributable to non-controlling interest	5,304	(253)
Net (loss) income attributable to the Partnership's unitholders	$ (75,883)	$ (83,338)