Segment Information (Detail) (USD $) In Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010		Dec. 31, 2010
Segment Reporting Information [Line Items]
Revenues from external customers	$ 501,315		$ 283,739		$ 1,337,668		$ 803,483
Intersegment revenues	0		0		0		0
Depreciation and amortization	42,341		32,565		122,116		98,367
Other operating expenses	377,589		244,991		1,047,791		714,257
Operating income (loss)	81,385		6,183		167,761		(9,141)
Loss on early extinguishment of debt	0		0		46,451		0
Interest expense, net of amounts capitalized	11,236		10,626		31,588		31,614
Income (loss) from continuing operations before tax	68,515		(3,663)		97,792		(39,199)
Long-lived assets	1,902,351	[1]	1,265,673	[1]	1,902,351	[1]	1,265,673	[1]
Total assets	2,468,982		1,680,975		2,468,982		1,680,975		1,892,936
Capital expenditures, excluding acquisitions	67,833		33,142		245,910		101,065
U.S.
Segment Reporting Information [Line Items]
Revenues from external customers	411,789		242,142		1,109,148		662,671
Intersegment revenues	4,342		2,916		4,342		6,058
Depreciation and amortization	35,515		26,001		101,767		79,534
Other operating expenses	270,067		176,783		756,325		495,689
Operating income (loss)	106,207		39,358		251,056		87,448
Loss on early extinguishment of debt					0
Interest expense, net of amounts capitalized	(26)		(197)		28		(872)
Income (loss) from continuing operations before tax	106,280		39,623		252,292		87,445
Long-lived assets	1,760,562	[1]	1,016,494	[1]	1,760,562	[1]	1,016,494	[1]
Total assets	2,186,779		1,475,934		2,186,779		1,475,934
Capital expenditures, excluding acquisitions	55,691		27,448		206,246		71,983
International
Segment Reporting Information [Line Items]
Revenues from external customers	89,526		41,597		228,520		140,812
Intersegment revenues	2,721		0		6,731		0
Depreciation and amortization	4,323		3,931		11,900		11,599
Other operating expenses	73,448		42,016		196,920		144,285
Operating income (loss)	11,755		(4,350)		19,700		(15,072)
Loss on early extinguishment of debt					0
Interest expense, net of amounts capitalized	679		88		1,590		(127)
Income (loss) from continuing operations before tax	9,416		(4,650)		19,646		(14,450)
Long-lived assets	190,216	[1]	106,679	[1]	190,216	[1]	106,679	[1]
Total assets	424,409		274,292		424,409		274,292
Capital expenditures, excluding acquisitions	7,995		(3,039)		28,900		6,657
Functional Support
Segment Reporting Information [Line Items]
Revenues from external customers	0		0		0		0
Intersegment revenues	1,394		0		1,394		0
Depreciation and amortization	2,503		2,633		8,449		7,234
Other operating expenses	34,074		26,192		94,546		74,283
Operating income (loss)	(36,577)		(28,825)		(102,995)		(81,517)
Loss on early extinguishment of debt					46,451
Interest expense, net of amounts capitalized	10,583		10,735		29,970		32,613
Income (loss) from continuing operations before tax	(47,181)		(38,636)		(174,146)		(112,194)
Long-lived assets	236,549	[1]	142,500	[1]	236,549	[1]	142,500	[1]
Total assets	383,026		223,055		383,026		223,055
Capital expenditures, excluding acquisitions	4,147		8,733		10,764		22,425
Intersegment Elimination
Segment Reporting Information [Line Items]
Revenues from external customers	0		0		0		0
Intersegment revenues	(8,457)		(2,916)		(12,467)		(6,058)
Depreciation and amortization	0		0		0		0
Other operating expenses	0		0		0		0
Operating income (loss)	0		0		0		0
Loss on early extinguishment of debt					0
Interest expense, net of amounts capitalized	0		0		0		0
Income (loss) from continuing operations before tax	0		0		0		0
Long-lived assets	(284,976)	[1]	0	[1]	(284,976)	[1]	0	[1]
Total assets	(525,232)		(292,306)		(525,232)		(292,306)
Capital expenditures, excluding acquisitions	$ 0		$ 0		$ 0		$ 0

[1] Long lived assets include: fixed assets, goodwill, intangibles and other assets.