STOCKHOLDERS' EQUITY - Additional Information (Detail) (USD $)	9 Months Ended		9 Months Ended							3 Months Ended		3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Restricted Stock [Member]	Sep. 30, 2014 First Fifty Percentage Restricted Stock Nonvest Awards [Member]	Sep. 30, 2013 First Fifty Percentage Restricted Stock Nonvest Awards [Member]	Sep. 30, 2014 First Fifty Percentage Restricted Stock Nonvest Awards [Member] Omnibus Plan [Member]	Sep. 30, 2014 Other Fifty Percentage Restricted Stock Nonvest Awards [Member]	Sep. 30, 2013 Other Fifty Percentage Restricted Stock Nonvest Awards [Member]	Sep. 30, 2014 Other Fifty Percentage Restricted Stock Nonvest Awards [Member] Omnibus Plan [Member]	Sep. 30, 2014 FirstBank [Member]	Sep. 09, 2014 Department Of Treasury [Member]	Sep. 30, 2014 Series A Preferred Stock [Member]	Sep. 30, 2014 Series B Preferred Stock [Member]	Sep. 30, 2014 Series C Preferred Stock [Member]	Sep. 30, 2014 Series D Preferred Stock [Member]	Sep. 30, 2014 Series E Preferred Stock [Member]
Class Of Stock [Line Items]
Common stock, shares authorized	2,000,000,000	2,000,000,000
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares issued	213,642,311	207,635,157
Common stock, shares outstanding	212,977,588	207,068,978
Granted shares of restricted stock	1,219,711
Restricted stock lapse, maximum				2 years 0 months 0 days	2 years 0 months 0 days		3 years 0 months 0 days	3 years 0 months 0 days
Percentage of restricted stock lapse					50.00%	50.00%		50.00%	50.00%
Corporation has authorized shares of preferred stock	50,000,000	50,000,000
Preferred stock, par value	$ 1
Preferred stock dividend rate percentage												7.125%	8.35%	7.40%	7.25%	7.00%
Stock repurchase plan treasury stock	664,723	566,179
Legal surplus reserve rate										10.00%
Original amount contributed in percentage										20.00%
Repurchased of common stock			23,555
Liquidation value per share	$ 25
Percentage Of Stock Ownership											9.20%
Sale Of Stock Price Per Share											$ 6.75
Common Stock Held											19,680,441
Secondary Offering Of Common Stock											13,261,356