STOCK PLANS (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2011 Y
Information about awards outstanding
Weighted Average Remaining Life (in years)	6.2
Outstanding
Number of Stock Options (in shares)	3,632,463
Exercisable
Number of Stock Options (in shares)	2,677,071
Exercise Price Range Under $ 17.50
Information about awards outstanding
Exercise price, high end of range (in dollars per share)	$ 17.50
Weighted Average Remaining Life (in years)	1.6
Outstanding
Number of Stock Options (in shares)	341,076
Weighted Average Exercise Price (in dollars per share)	$ 12.59
Exercisable
Number of Stock Options (in shares)	341,076
Weighted Average Exercise Price (in dollars per share)	$ 12.59
Exercise Price Range $17.50 to $20.00
Information about awards outstanding
Exercise price, low end of range (in dollars per share)	$ 17.50
Exercise price, high end of range (in dollars per share)	$ 20.00
Weighted Average Remaining Life (in years)	3.4
Outstanding
Number of Stock Options (in shares)	755,547
Weighted Average Exercise Price (in dollars per share)	$ 18.88
Exercisable
Number of Stock Options (in shares)	755,547
Weighted Average Exercise Price (in dollars per share)	$ 18.88
Exercise Price Range Over $ 20.00
Information about awards outstanding
Exercise price, low end of range (in dollars per share)	$ 20.00
Weighted Average Remaining Life (in years)	7.6
Outstanding
Number of Stock Options (in shares)	2,535,840
Weighted Average Exercise Price (in dollars per share)	$ 30.00
Exercisable
Number of Stock Options (in shares)	1,580,448
Weighted Average Exercise Price (in dollars per share)	$ 28.46