STOCK-BASED COMPENSATION PLANS (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
STOCK-BASED COMPENSATION PLANS
Stock-based compensation expense	$ 4,415	$ 4,300	$ 9,644	$ 9,686
Shares
Exercised (in shares)			(11,235)	(97,987)
Stock options
STOCK-BASED COMPENSATION PLANS
Stock-based compensation expense	2,117	1,503	4,781	3,459
Shares
Stock options Outstanding at the beginning of the period (in shares)			11,503,869	5,427,011
Granted (in shares)				2,020,363
Exercised (in shares)			(1,200)	(51,988)
Forfeited (in shares)			(240,128)	(404,192)
Expired (in shares)			(499,088)	(927,078)
Stock options Outstanding at the end of the period (in shares)	10,763,453	6,064,116	10,763,453	6,064,116
Weighted Average Exercise Price
Stock options Outstanding at the beginning of the period (in dollars per share)	$ 15.65	$ 20.21	$ 15.65	$ 20.21
Granted (in dollars per share)		$ 15.27		$ 15.27
Exercised (in dollars per share)	$ 14.17	$ 11.05	$ 14.17	$ 11.05
Forfeited (in dollars per share)	$ 14.67	$ 14.73	$ 14.67	$ 14.73
Expired (in dollars per share)	$ 46.39	$ 39.31	$ 46.39	$ 39.31
Stock options Outstanding at the end of the period (in dollars per share)	$ 13.65	$ 15.95	$ 13.65	$ 15.95
Restricted Stock
STOCK-BASED COMPENSATION PLANS
Stock-based compensation expense	$ 2,298	$ 2,797	$ 4,863	$ 6,227