SEGMENT INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues and long-lived assets by geographic region
Revenues	$ 2,463,450	$ 1,181,237	$ 820,430
Long-Lived Assets	414,242	281,752	103,848
U.S. and Puerto Rico
Revenues and long-lived assets by geographic region
Revenues	1,397,636	872,112	710,214
Long-Lived Assets	22,619	14,231	11,067
Canada
Revenues and long-lived assets by geographic region
Revenues	256,820	154,200	94,142
Long-Lived Assets	129,510	94,435	83,471
Poland
Revenues and long-lived assets by geographic region
Revenues	179,501	30,430
Long-Lived Assets	106,743	60,390
Mexico
Revenues and long-lived assets by geographic region
Revenues	151,948	42,833
Long-Lived Assets	53,500	51,367
Brazil
Revenues and long-lived assets by geographic region
Revenues	87,190	22,595
Long-Lived Assets	49,231	46,074
Serbia
Revenues and long-lived assets by geographic region
Revenues	81,867
Long-Lived Assets	10,039
Australia
Revenues and long-lived assets by geographic region
Revenues	79,204	17,616
Long-Lived Assets	16,636	1,724
Other
Revenues and long-lived assets by geographic region
Revenues	229,284	41,451	16,074
Long-Lived Assets	$ 25,964	$ 13,531	$ 9,310