SEGMENT INFORMATION GEOGRAPHIC INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers	$ 493,638	$ 404,719	$ 459,233	$ 463,088	$ 402,917	$ 398,805	$ 404,447	$ 280,829	$ 1,820,678	$ 1,486,998	$ 881,591	$ 881,591
Long-lived Assets	593,285				354,583				593,285	354,583	248,054
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers									1,356,264	1,210,531	881,591
Long-lived Assets	262,064				248,835				262,064	248,835	248,054
Other Countries [Domain]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from external customers									464,414	276,467		0
Long-lived Assets	$ 331,221				$ 105,748				$ 331,221	$ 105,748	$ 0