ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (87,700)
Total other comprehensive income (loss), net of tax	$ 12,228	$ (2,326)	(43,752)	$ 2,940
Ending balance	(130,295)		(130,295)
Tax provision (benefit) of other comprehensive loss before reclassifications related to unrealized losses on available-for-sale securities	(200)	(100)	(300)	(700)
Tax provision (benefit) for amounts reclassified from accumulated other comprehensive loss	(100)	(800)	(100)	(800)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(143,182)	(15,132)	(86,848)	(20,352)
Other comprehensive income before reclassifications, net of tax benefit (provision) related to unrealized gains on available-for-sale securities	9,287	(150)	(47,047)	5,070
Amounts reclassified related to unrealized losses on available for sale securities, net of tax benefit of $0.8 million	0	0	0	0
Total other comprehensive income (loss), net of tax	9,287	(150)	(47,047)	5,070
Ending balance	(133,895)	(15,282)	(133,895)	(15,282)
Unrealized (Losses) Gains On Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(91)	7,435	(852)	7,306
Other comprehensive income before reclassifications, net of tax benefit (provision) related to unrealized gains on available-for-sale securities	3,528	(799)	4,289	(670)
Amounts reclassified related to unrealized losses on available for sale securities, net of tax benefit of $0.8 million	163	(1,260)	163	(1,260)
Total other comprehensive income (loss), net of tax	3,691	(2,059)	4,452	(1,930)
Ending balance	3,600	5,376	3,600	5,376
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(143,273)	(7,697)	(87,700)	(13,046)
Other comprehensive income before reclassifications, net of tax benefit (provision) related to unrealized gains on available-for-sale securities	12,815	(949)	(42,758)	4,400
Amounts reclassified related to unrealized losses on available for sale securities, net of tax benefit of $0.8 million	163	(1,260)	163	(1,260)
Total other comprehensive income (loss), net of tax	12,978	(2,209)	(42,595)	3,140
Ending balance	$ (130,295)	$ (9,906)	$ (130,295)	$ (9,906)