STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details) (USD $)	12 Months Ended				1 Months Ended	12 Months Ended			0 Months Ended			0 Months Ended				0 Months Ended			3 Months Ended								12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Apr. 30, 2008 Series A Non-Cumulative Perpetual Convertible Preferred Stock	Dec. 31, 2012 Series A Non-Cumulative Perpetual Convertible Preferred Stock	Dec. 31, 2011 Series A Non-Cumulative Perpetual Convertible Preferred Stock	Apr. 23, 2008 Series A Non-Cumulative Perpetual Convertible Preferred Stock	Dec. 29, 2010 Series B Fixed Rate Cumulative Perpetual Preferred Stock	Dec. 05, 2008 Series B Fixed Rate Cumulative Perpetual Preferred Stock	Dec. 31, 2010 Series B Fixed Rate Cumulative Perpetual Preferred Stock	Nov. 05, 2009 Common Stock and Series C Preferred Stock	Mar. 25, 2010 Series C Cumulative Convertible Preferred Stock	Nov. 05, 2009 Series C Cumulative Convertible Preferred Stock	Mar. 30, 2010 Series C Cumulative Convertible Preferred Stock	Jan. 19, 2012 Common Stock	Mar. 25, 2010 Common Stock	Nov. 05, 2009 Common Stock	Dec. 31, 2012 Common Stock	Sep. 30, 2012 Common Stock	Jun. 30, 2012 Common Stock	Mar. 31, 2012 Common Stock	Dec. 31, 2011 Common Stock	Sep. 30, 2011 Common Stock	Jun. 30, 2011 Common Stock	Mar. 31, 2011 Common Stock	Dec. 31, 2012 Common Stock	Dec. 31, 2011 Common Stock	Mar. 30, 2010 Common Stock	Dec. 31, 2012 Series A Non-Cumulative Perpetual Convertible Preferred Stock and Series B Fixed Rate Cumulative Perpetual Preferred Stock	Dec. 31, 2011 Series A Non-Cumulative Perpetual Convertible Preferred Stock and Series B Fixed Rate Cumulative Perpetual Preferred Stock
Class of Stock
Number of shares issued during the period					200,000					306,546				335,047				18,247,012
Preferred stock dividend rate (as a percent)					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					64.9942										110.74197
Convertible preferred stock conversion price per share					$ 15.39
Conversion premium of the convertible preferred stock based on the closing price of the common stock (as a percent)					22.50%
Closing price of common stock at issuance of convertible preferred stock (in dollars per share)								$ 12.56
Preferred shares outstanding						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
Stock issuance discount									17,500,000
Dividends and accretion									56,900,000
Accretion of stock issuance discount											25,200,000
Savings in annual dividend									15,300,000
Proceeds from issuance of private placement	0											500,000,000
Number of common shares issued upon conversion of Series C convertible preferred stock in the private placement (in shares)																	37,103,734
Number of preferred shares converted													335,047
Common stock conversion price per share upon conversion of Series C convertible preferred stock in the private placement (in dollars per share)																													$ 9.03
Amount of stock repurchase approved by the Board of Directors																200,000,000
Purchase of treasury stock pursuant to the Stock Repurchase Program, shares	9,068,105
Weighted average cost of shares repurchased (in dollars per share)	$ 22.02
Total cost of repurchase of treasury shares	199,900,000
Quarterly Dividends
Dividend per share (in dollars per share)						$ 20.00	$ 20.00
Preferred stock cash dividends paid									31,700,000																					6,900,000	6,900,000
Dividend per share (in dollars per share)	$ 0.4	$ 0.16	$ 0.04																$ 0.10	$ 0.10	$ 0.10	$ 0.10	$ 0.05	$ 0.05	$ 0.05	$ 0.01	$ 0.10
Common stock cash dividends paid																											57,600,000	23,900,000
Accumulated Other Comprehensive (Loss)/Income
Accumulated other comprehensive income (loss), net of tax	4,669,000	(33,940,000)	(12,414,000)	599,000
Net unrealized loss on securities available for sale	0	(34,800,000)
Foreign exchange translation adjustment	$ 0	$ 900,000