ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other	$ (327)	$ (242)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2012	(32,169)
Other comprehensive loss before reclassifications	(11,926)
Amounts reclassified from accumulated other comprehensive loss	(1)
Net current period other comprehensive loss	(13,399)	31,809
Balance as of March 31, 2013	(44,096)
Other comprehensive (loss) income, net of tax	(12,815)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2012	(25,073)
Other comprehensive loss before reclassifications	(6,951)
Amounts reclassified from accumulated other comprehensive loss	0
Net current period other comprehensive loss	(6,951)
Balance as of March 31, 2013	(32,024)
Unrealized Losses On Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance as of December 31, 2012	(7,096)
Other comprehensive loss before reclassifications	(4,975)
Amounts reclassified from accumulated other comprehensive loss	(1)
Net current period other comprehensive loss	(4,976)
Balance as of March 31, 2013	(12,072)
Unrealized Losses On Available-For-Sale Securities | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other	100
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Other comprehensive (loss) income, net of tax	$ (11,927)