Guarantor Subsidiaries Summarization of Corrections Guarantor Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Change in advances affiliates	$ 0	$ 0
Net cash provided by (used in) investing activities	(717,750)	(700,008)
Change in advances affiliates	0	0
Net cash provided by (used in) financing activities	(16,661)	990,578
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	114,057	1,044,230
CASH AND CASH EQUIVALENTS, end of period	2,057,339	1,840,761	1,943,282	796,531
Parent
Change in advances affiliates	4,382	18,039
Net cash provided by (used in) investing activities	(142,765)	93,250
Change in advances affiliates	0	0
Net cash provided by (used in) financing activities	(82)	54,307
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(141,909)	148,487
CASH AND CASH EQUIVALENTS, end of period	515,380	656,336	657,289	507,849
Parent | As Previously Reported
Change in advances affiliates		679,885
Net cash provided by (used in) investing activities		755,096
Change in advances affiliates		292,154
Net cash provided by (used in) financing activities		346,461
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		1,102,487
CASH AND CASH EQUIVALENTS, end of period		1,610,336
Parent | As Corrected
Change in advances affiliates		18,039
Net cash provided by (used in) investing activities		93,250
Change in advances affiliates		0
Net cash provided by (used in) financing activities		54,307
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		148,487
CASH AND CASH EQUIVALENTS, end of period		656,336
Issuer
Change in advances affiliates	245,866	264,367
Net cash provided by (used in) investing activities	285,253	193,636
Change in advances affiliates	291,862	0
Net cash provided by (used in) financing activities	281,951	942,493
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	255,965	895,763
CASH AND CASH EQUIVALENTS, end of period	1,541,231	1,183,705	1,285,266	287,942
Issuer | As Previously Reported
Change in advances affiliates		(689,633)
Net cash provided by (used in) investing activities		(760,364)
Change in advances affiliates		0
Net cash provided by (used in) financing activities		942,493
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		(58,237)
CASH AND CASH EQUIVALENTS, end of period		229,705
Issuer | As Corrected
Change in advances affiliates		264,367
Net cash provided by (used in) investing activities		193,636
Change in advances affiliates		0
Net cash provided by (used in) financing activities		942,493
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		895,763
CASH AND CASH EQUIVALENTS, end of period		1,183,705
Eliminations
Change in advances affiliates	(250,248)	(282,406)
Net cash provided by (used in) investing activities	(250,248)	(282,406)
Change in advances affiliates	250,248	282,406
Net cash provided by (used in) financing activities	250,248	282,406
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	0	0
CASH AND CASH EQUIVALENTS, end of period	0	0	0	0
Eliminations | As Previously Reported
Change in advances affiliates		9,748
Net cash provided by (used in) investing activities		9,478
Change in advances affiliates		(9,748)
Net cash provided by (used in) financing activities		(9,748)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		0
CASH AND CASH EQUIVALENTS, end of period		0
Eliminations | As Corrected
Change in advances affiliates		(282,406)
Net cash provided by (used in) investing activities		(282,406)
Change in advances affiliates		282,406
Net cash provided by (used in) financing activities		282,406
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS		0
CASH AND CASH EQUIVALENTS, end of period		$ 0