Supplemental Condensed Consolidating Financial Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Condensed Consolidating Statements of Operations
Total revenue	$ 371,510	$ 283,737	$ 446,053	$ 350,466	$ 333,913	$ 507,826	$ 400,439	$ 263,221	$ 1,451,766	$ 1,505,399	$ 1,187,631
Operating expenses:
Purchased product costs									516,366	735,330	606,340
Facility expenses									209,756	167,118	150,154
Selling, general and administrative expenses									94,116	81,229	75,258
Depreciation and amortization									242,869	193,571	164,031
Other operating expenses									6,931	9,987	3,386
Total operating expenses									1,070,038	1,187,235	999,169
(Loss) income from operations	61,825	9,562	258,902	51,439	(7,557)	207,801	133,214	(15,294)	381,728	318,164	188,462
Loss on redemption of debt					(35,500)			(43,300)		(78,996)	(46,326)
Other expense, net									(124,612)	(119,274)	(107,845)
Income before provision for income tax									257,116	119,894	34,291
Provision for income tax expense									38,328	13,649	3,189
Net income	30,135	(14,756)	187,136	16,273	(61,743)	153,454	89,205	(74,671)	218,788	106,245	31,102
Net (income) loss attributable to non-controlling interest									1,614	(45,550)	(30,635)
Net income attributable to the Partnership's unitholders									220,402	60,695	467
Parent
Operating expenses:
Selling, general and administrative expenses									48,949	46,903	46,549
Depreciation and amortization									607	719	594
Other operating expenses									2	673	753
Total operating expenses									49,558	48,295	47,896
(Loss) income from operations									(49,558)	(48,295)	(47,896)
Earnings from consolidated affiliates									366,460	288,870	183,557
Loss on redemption of debt										(78,996)	(46,326)
Other expense, net									(118,563)	(91,612)	(82,000)
Income before provision for income tax									198,339	69,967	7,335
Provision for income tax expense									1,689	2,742	1,299
Net income									196,650	67,225	6,036
Net income attributable to the Partnership's unitholders									196,650	67,225	6,036
Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue									1,125,368	1,240,004	1,063,621
Operating expenses:
Purchased product costs									441,853	651,132	589,403
Facility expenses									137,261	128,612	122,240
Selling, general and administrative expenses									19,069	31,015	27,339
Depreciation and amortization									164,858	151,362	136,781
Other operating expenses									4,341	9,030	2,342
Total operating expenses									767,382	971,151	878,105
(Loss) income from operations									357,986	268,853	185,516
Earnings from consolidated affiliates									67,743	44,425	15,963
Other expense, net									(22,630)	(13,501)	(16,032)
Income before provision for income tax									403,099	299,777	185,447
Provision for income tax expense									36,639	10,907	1,890
Net income									366,460	288,870	183,557
Net income attributable to the Partnership's unitholders									366,460	288,870	183,557
Non-Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue									338,196	265,395	124,010
Operating expenses:
Purchased product costs									74,513	84,198	16,937
Facility expenses									73,367	39,171	28,566
Selling, general and administrative expenses									31,147	9,011	6,317
Depreciation and amortization									81,898	42,198	27,054
Other operating expenses									2,588	284	291
Total operating expenses									263,513	174,862	79,165
(Loss) income from operations									74,683	90,533	44,845
Other expense, net									(8,554)	(558)	1,753
Income before provision for income tax									66,129	89,975	46,598
Net income									66,129	89,975	46,598
Net income attributable to the Partnership's unitholders									66,129	89,975	46,598
Consolidating Adjustments
Condensed Consolidating Statements of Operations
Total revenue									(11,798)
Operating expenses:
Facility expenses									(872)	(665)	(652)
Selling, general and administrative expenses									(5,049)	(5,700)	(4,947)
Depreciation and amortization									(4,494)	(708)	(398)
Total operating expenses									(10,415)	(7,073)	(5,997)
(Loss) income from operations									(1,383)	7,073	5,997
Earnings from consolidated affiliates									(434,203)	(333,295)	(199,520)
Other expense, net									25,135	(13,603)	(11,566)
Income before provision for income tax									(410,451)	(339,825)	(205,089)
Net income									(410,451)	(339,825)	(205,089)
Net (income) loss attributable to non-controlling interest									1,614	(45,550)	(30,635)
Net income attributable to the Partnership's unitholders									$ (408,837)	$ (385,375)	$ (235,724)