Supplemental Condensed Consolidating Financial Information (Details 2) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidating Statements of Operations
Total revenue	$ 400,439	$ 323,850	$ 663,660	$ 632,229
Operating expenses:
Purchased product costs	154,326	119,731	327,349	277,416
Facility expenses	43,625	38,361	80,038	75,460
Selling, general and administrative expenses	18,580	16,419	40,292	37,927
Depreciation and amortization	48,031	40,011	93,212	78,391
Other operating expenses	2,663	257	4,849	391
Total operating expenses	267,225	214,779	545,740	469,585
Income from operations	133,214	109,071	117,920	162,644
Loss on redemption of debt			(43,328)
Other (expense) income, net	(29,301)	(26,082)	(59,480)	(49,225)
Income before provision for income tax	103,913	82,989	15,112	113,419
Provision for income tax expense	14,708	16,021	578	20,447
Net income	89,205	66,968	14,534	92,972
Net income attributable to non-controlling interest	(10,708)	(6,751)	(20,066)	(11,245)
Net income (loss) attributable to the Partnership	78,497	60,217	(5,532)	81,727
Parent
Operating expenses:
Selling, general and administrative expenses	11,224	11,259	24,078	23,040
Depreciation and amortization	181	144	356	291
Other operating expenses	374		673
Total operating expenses	11,779	11,403	25,107	23,331
Income from operations	(11,779)	(11,403)	(25,107)	(23,331)
Earnings from consolidated affiliates	114,152	93,532	112,919	147,385
Loss on redemption of debt			(43,328)
Other (expense) income, net	(22,071)	(19,585)	(46,965)	(39,136)
Income before provision for income tax	80,302	62,544	(2,481)	84,918
Provision for income tax expense	449	341	107	496
Net income	79,853	62,203	(2,588)	84,422
Net income (loss) attributable to the Partnership	79,853	62,203	(2,588)	84,422
Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue	348,371	300,437	566,851	585,581
Operating expenses:
Purchased product costs	144,403	119,707	307,847	274,780
Facility expenses	35,419	31,350	64,350	60,143
Selling, general and administrative expenses	7,153	4,893	15,371	14,528
Depreciation and amortization	38,008	33,924	74,477	66,634
Other operating expenses	1,987	250	3,826	95
Total operating expenses	226,970	190,124	465,871	416,180
Income from operations	121,401	110,313	100,980	169,401
Earnings from consolidated affiliates	10,769	2,436	18,144	3,265
Other (expense) income, net	(3,759)	(3,537)	(5,734)	(5,330)
Income before provision for income tax	128,411	109,212	113,390	167,336
Provision for income tax expense	14,259	15,680	471	19,951
Net income	114,152	93,532	112,919	147,385
Net income (loss) attributable to the Partnership	114,152	93,532	112,919	147,385
Non-Guarantor Subsidiaries
Condensed Consolidating Statements of Operations
Total revenue	52,068	23,413	96,809	46,648
Operating expenses:
Purchased product costs	9,923	24	19,502	2,636
Facility expenses	8,373	7,174	16,022	15,643
Selling, general and administrative expenses	1,932	1,477	3,969	2,787
Depreciation and amortization	10,011	6,025	18,696	11,622
Other operating expenses	302	7	350	296
Total operating expenses	30,541	14,707	58,539	32,984
Income from operations	21,527	8,706	38,270	13,664
Other (expense) income, net	(50)	481	(60)	846
Income before provision for income tax	21,477	9,187	38,210	14,510
Net income	21,477	9,187	38,210	14,510
Net income (loss) attributable to the Partnership	21,477	9,187	38,210	14,510
Consolidating Adjustments
Operating expenses:
Facility expenses	(167)	(163)	(334)	(326)
Selling, general and administrative expenses	(1,729)	(1,210)	(3,126)	(2,428)
Depreciation and amortization	(169)	(82)	(317)	(156)
Total operating expenses	(2,065)	(1,455)	(3,777)	(2,910)
Income from operations	2,065	1,455	3,777	2,910
Earnings from consolidated affiliates	(124,921)	(95,968)	(131,063)	(150,650)
Other (expense) income, net	(3,421)	(3,441)	(6,721)	(5,605)
Income before provision for income tax	(126,277)	(97,954)	(134,007)	(153,345)
Net income	(126,277)	(97,954)	(134,007)	(153,345)
Net income attributable to non-controlling interest	(10,708)	(6,751)	(20,066)	(11,245)
Net income (loss) attributable to the Partnership	$ (136,985)	$ (104,705)	$ (154,073)	$ (164,590)