Condensed Consolidating Information (Details 2) (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Parent Company [Member]	Jun. 30, 2010 Parent Company [Member]	Jun. 30, 2011 Wholly Owned Subsidiary Guarantors [Member]	Jun. 30, 2010 Wholly Owned Subsidiary Guarantors [Member]	Jun. 30, 2011 Issuers [Member]	Jun. 30, 2010 Issuers [Member]	Jun. 30, 2011 Non-Guarantor Subsidiaries [Member]	Jun. 30, 2010 Non-Guarantor Subsidiaries [Member]	Jun. 30, 2011 Consolidated Eliminations [Member]	Dec. 31, 2010 Consolidated Eliminations [Member]
Condensed Consolidating Statement of Cash Flows
Net cash (used in) provided by operating activities	$ 186,300	$ 207,717	$ (56,351)	$ (5,903)	$ 89,686	$ 96,416	$ 107,843	$ 110,425	$ 45,122	$ 6,779
Net cash provided by (used in) investing activities	(744,606)	(21,437)	(322,302)	(11,083)	97,521	4,617	(500,879)	(14,426)	(18,946)	(545)
Cash flows from financing activities:
Net change in borrowings under revolving credit facilities	99,500	117,280				33,280	99,500	84,000
Proceeds from debt	704,111	696					689,374		14,737	696
Repayment of debt	(337,427)	(215,171)		0	(326,975)	(60,054)	0	(149,127)	(10,452)	(5,990)
Net change in intercompany debt	0	0	188,002	270,919	214,413	(116,945)	(407,836)	8,100	5,421	(162,074)
Payment of deferred financing costs	(1,363)	(1,840)			(73)	(48)	(985)	(1,792)	(305)
Issuance of common stock, net	299,884		299,884
Cash distribution (to) from affiliates	0	0	7,932	(88,220)	(2,252)	44,331	12,882	(120,018)	(18,562)	163,907
Cash distribution to common stockholders	(201,949)	(167,829)	(201,949)	(167,829)
Contributions from noncontrolling interest		633								633
Distributions to noncontrolling interest	(616)	(4,277)							(616)	(4,277)
Other	955	4,673	955	4,673
Net cash provided by (used in) financing activities	563,095	(265,835)	294,824	19,543	(114,887)	(99,436)	392,935	(178,837)	(9,777)	(7,105)
Net increase (decrease) in cash and cash equivalents	4,789	(79,555)	(83,829)	2,557	72,320	1,597	(101)	(82,838)	16,399	(871)
Effect of foreign currency translation on cash and cash equivalents	101	(48)					101	(48)
Cash and cash equivalents at beginning of period	21,812	107,397	1,083		8,263	7,873	0	82,886	12,466	16,638	0	0
Cash and cash equivalents at end of period	$ 26,702	$ 27,794	$ (82,746)	$ 2,557	$ 80,583	$ 9,470	$ 0		$ 28,865	$ 15,767	$ 0	$ 0

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 should not be reported as cash and cash equivalents.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7, 26

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 8, 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 7
-Footnote 1

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 1
-Article 5