STOCKHOLDERS' EQUITY 2 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Total stock-based compensation expense, excluding acquisition-related charges
Stock-based compensation expense
Total stock-based compensation expense, before income taxes	$ 72,442	$ 68,125	$ 60,510
Tax benefit	(12,060)	(10,453)	(7,548)
Total stock-based compensation expense, net of income taxes	60,382	57,672	52,962
Cost of revenues
Stock-based compensation expense
Total stock-based compensation expense, before income taxes	8,052	7,840	8,159
Research and development
Stock-based compensation expense
Total stock-based compensation expense, before income taxes	22,825	22,916	19,324
Selling, general and administrative
Stock-based compensation expense
Total stock-based compensation expense, before income taxes	$ 41,565	$ 37,369	$ 33,027