STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 2) (USD $)	12 Months Ended	0 Months Ended
	Dec. 31, 2011	Jan. 26, 2011 Warrants	Dec. 31, 2008 Warrants
Class of Warrant or Right
Initial price per share of common stock for which the warrants may be exercised (in dollars per share)			$ 15.15
Allocated fair value of warrants			$ 25,200,000
Warrants repurchased (in shares)	1,517,555	1,517,555
Cash paid to repurchase warrants	$ 14,500,000	$ 14,500,000