STOCK OPTIONS AND STOCK AWARDS (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Common stock options
Stock Option Information
Expiration period of shares granted	10 years
Vesting period	4 years
Interval period for vesting of granted awards	1 year
Stock options, Shares
Options outstanding at the beginning of the period (in shares)	6,626,176
Granted (in shares)	1,106,309
Exercised (in shares)	(4,600)
Forfeited (in shares)	(208,090)
Outstanding at the end of the period (in shares)	7,519,795
Exercisable at end of the period (in shares)	3,995,439
Stock options, Weighted average exercise price
Options outstanding at the beginning of the period (in dollars per share)	$ 22.50
Granted (in dollars per share)	$ 17.56
Exercised (in dollars per share)	$ 14.14
Forfeited (in dollars per share)	$ 26.01
Outstanding at the end of the period (in dollars per share)	$ 21.68
Exercisable at the end of the period (in dollars per share)	$ 23.35
Stock options, Weighted average remaining contractual life (in years)
Outstanding at end of the period	7 years 2 months 8 days
Exercisable at the end of the period	5 years 10 months 6 days
Stock options, Aggregate intrinsic value
Outstanding at the end of the period	$ 5,243
Exercisable at the end of the period	4,948
Additional disclosure
Stock closing price (in dollars per share)	$ 16.63
Total intrinsic value of options exercised	$ 15
Number of exercisable shares of common stock in-the-money	958,413
2004 Plan
Stock Option Information
Number of shares available for future grants	2,923,032