SUBSEQUENT EVENTS (Details) (USD $)	12 Months Ended	0 Months Ended			0 Months Ended
	Dec. 31, 2012	Jan. 19, 2012 Common Stock	Jan. 23, 2013 Dividend declared Common Stock	Jan. 23, 2013 Dividend declared Series A preferred stock	Jan. 23, 2013 Common stock repurchase Common Stock
Subsequent events
Dividend payable (in dollars per share)			$ 0.15	$ 20
Stock repurchase program authorized amount		$ 200,000,000			$ 200,000,000
Repurchase of common stock	$ 199,950,000				$ 56,800,000