Condensed Consolidating Information (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Condensed Consolidating Financial Statements
Net cash provided by (used in) operating activities	$ 486,355	$ 169,307	$ 445,556
Net cash provided by (used in) investing activities	(235,837)	(149,078)	(373,945)
Financing activities
Issuance of long term debt	10,103	556,553	1,268,435
Repayments of long term debt	(7,740)	(346,963)	(1,690,557)
Other	(48,633)	(52,314)	343,286
Net cash provided by (used in) financing activities	(46,270)	157,276	(78,836)
Increase (decrease) in cash and equivalents	204,248	177,505	(7,225)
Cash and equivalents at beginning of year	186,513	9,008	16,233
Cash and equivalents at end of year	390,761	186,513	9,008
Parent
Condensed Consolidating Financial Statements
Net cash provided by (used in) operating activities	380,171	262,155	261,605
Net cash provided by (used in) investing activities	(230,314)	(38,811)	(77,069)
Financing activities
Issuance of long term debt		554,001	1,219,500
Repayments of long term debt	(6,505)	(361,383)	(1,699,972)
Other	(15,842)	(242,829)	294,977
Net cash provided by (used in) financing activities	(22,347)	(50,211)	(185,495)
Increase (decrease) in cash and equivalents	127,510	173,133	(959)
Cash and equivalents at beginning of year	173,563	430	1,389
Cash and equivalents at end of year	301,073	173,563	430
Guarantors
Condensed Consolidating Financial Statements
Net cash provided by (used in) operating activities	173,574	17,011	176,382
Net cash provided by (used in) investing activities	(50,576)	(51,414)	(71,998)
Financing activities
Issuance of long term debt	10,103
Repayments of long term debt	(1,075)	14,979	9,486
Other	(83,955)	23,690	(119,022)
Net cash provided by (used in) financing activities	(74,927)	38,669	(109,536)
Increase (decrease) in cash and equivalents	48,071	4,266	(5,152)
Cash and equivalents at beginning of year	10,628	6,362	11,514
Cash and equivalents at end of year	58,699	10,628	6,362
Combined Non-Guarantors
Condensed Consolidating Financial Statements
Net cash provided by (used in) operating activities	(68,110)	(109,221)	(38,811)
Net cash provided by (used in) investing activities	(65,144)	(59,491)	(227,459)
Financing activities
Issuance of long term debt	101,686	110,743	227,831
Repayments of long term debt	(82,241)	(559)	(71)
Other	142,476	58,634	37,396
Net cash provided by (used in) financing activities	161,921	168,818	265,156
Increase (decrease) in cash and equivalents	28,667	106	(1,114)
Cash and equivalents at beginning of year	2,322	2,216	3,330
Cash and equivalents at end of year	30,989	2,322	2,216
Consolidating Adjustments
Condensed Consolidating Financial Statements
Net cash provided by (used in) operating activities	720	(638)	46,380
Net cash provided by (used in) investing activities	110,197	638	2,581
Financing activities
Issuance of long term debt	(101,686)	(108,191)	(178,896)
Repayments of long term debt	82,081
Other	(91,312)	108,191	129,935
Net cash provided by (used in) financing activities	$ (110,917)		$ (48,961)

Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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