FAIR VALUE MEASUREMENTS (Details Tables) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS:
Short-term investments	$ 5,487,526	$ 3,646,845
LIABILITIES:
Redeemable noncontrolling interests	0	160,287
Foreign government securities [Member]
ASSETS:
Short-term investments	3,605,753	1,886,553
U.S. government securities [Member]
ASSETS:
Short-term investments	1,881,371	1,760,292
Corporate Debt Securities [Member]
ASSETS:
Short-term investments	402
Recurring Basis [Member] | Level 2 [Member]
ASSETS:
Foreign exchange derivatives	168	1,038
Total assets at fair value	5,487,694	3,647,883
LIABILITIES:
Foreign exchange derivatives	80,573	63,151
Total liabilities at fair value	80,573	63,151
Recurring Basis [Member] | Level 2 [Member] | Foreign government securities [Member]
ASSETS:
Short-term investments	3,605,753	1,886,553
Recurring Basis [Member] | Level 2 [Member] | U.S. government securities [Member]
ASSETS:
Short-term investments	1,881,371	1,760,292
Recurring Basis [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
ASSETS:
Short-term investments	402
Recurring Basis [Member] | Level 3 [Member]
LIABILITIES:
Redeemable noncontrolling interests	0	160,287
Total liabilities at fair value	0	160,287
Recurring Basis [Member] | Total [Member]
ASSETS:
Foreign exchange derivatives	168	1,038
Total assets at fair value	5,487,694	3,647,883
LIABILITIES:
Foreign exchange derivatives	80,573	63,151
Redeemable noncontrolling interests	0	160,287
Total liabilities at fair value	80,573	223,438
Recurring Basis [Member] | Total [Member] | Foreign government securities [Member]
ASSETS:
Short-term investments	3,605,753	1,886,553
Recurring Basis [Member] | Total [Member] | U.S. government securities [Member]
ASSETS:
Short-term investments	$ 1,881,371	$ 1,760,292