STOCKHOLDERS' EQUITY (Details) (USD $)	9 Months Ended			1 Months Ended	3 Months Ended		1 Months Ended				3 Months Ended	9 Months Ended	12 Months Ended				9 Months Ended	1 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Apr. 30, 2008 Series A Non-Cumulative Perpetual Convertible Preferred Stock [Member]	Sep. 30, 2011 Series A Non-Cumulative Perpetual Convertible Preferred Stock [Member]	Jul. 20, 2011 Series A Non-Cumulative Perpetual Convertible Preferred Stock [Member]	Dec. 29, 2010 Series B Fixed Rate Cumulative Perpetual Preferred Stock [Member]	Dec. 05, 2008 Series B Fixed Rate Cumulative Perpetual Preferred Stock [Member]	Mar. 30, 2010 Series C Cumulative Convertible Preferred Stock [Member]	Nov. 05, 2009 Series C Cumulative Convertible Preferred Stock [Member]	Sep. 30, 2011 Common Stock [Member]	Sep. 30, 2011 Common Stock [Member]	Dec. 31, 2007 Common Stock [Member]	Jul. 20, 2011 Common Stock [Member]	Mar. 30, 2010 Common Stock [Member]	Nov. 05, 2009 Common Stock [Member]	Sep. 30, 2011 Preferred Stock, Series A [Member]	Jan. 26, 2011 Warrants [Member]	Dec. 31, 2008 Warrants [Member]
Class of Stock [Line Items]
Number of preferred shares issued (in shares)	200,000		200,000	200,000				306,546		335,047
Preferred stock dividend rate (in hundredths)				8.00%
Preferred stock liquidation preference (in dollars per share)				$ 1,000				$ 1,000		$ 1,000
Proceeds from issuance of convertible preferred stock				$ 194,100,000
Number of common stock shares convertible from each share of convertible preferred stock (in shares)				64.9942					110.74197
Convertible preferred stock conversion price premium per share of common stock based on closing price of common stock (in dollars per share)				$ 15.39
Conversion premium of the convertible preferred stock based on the closing price of the common stock (in hundredths)				22.50%
Closing price of common stock at issuance of convertible preferred stock (in dollars per share)				$ 12.56
Preferred shares outstanding (in shares)	85,710		85,741		85,710
Proceeds from issuance of preferred stock issued to the U.S. Treasury								306,500,000
Cash paid to repurchase preferred stock plus accrued and unpaid dividends							308,400,000
Value of preferred stock issued	83,027,000		83,058,000													500,000,000
Number of shares of convertible preferred stock converted to common shares in the private placement (in shares)																335,047
Number of shares of common stock issued in the private placement (in shares)																18,247,012
Number of shares of common stock issued upon conversion of convertible preferred stock (in shares)															37,103,734
Preferred stock to common stock conversion price (in dollars per share)									$ 9.03
Amount of stock repurchase approved by the Board of Directors													80,000,000
Dividend declaration date						July 20, 2011								July 20, 2011
Dividend per share (in dollars per share)						$ 20.00								$ 0.05
Dividend payment date						August 1, 2011								August 24, 2011
Dividend record date						July 15, 2011								August 10, 2011
Preferred stock cash dividends paid					1,700,000												5,100,000
Common stock cash dividends paid											7,500,000	16,400,000
Common shares outstanding at end of period (in shares)	148,961,927		148,542,940								148,961,927	148,961,927
Class of Warrant or Right [Line Items]
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
Cash paid to repurchase warrants	$ 14,500,000	$ 0																$ 14,500,000