SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended	12 Months Ended				36 Months Ended
	Mar. 31, 2010	Dec. 31, 2011 branchlocations	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2005	Dec. 31, 2011 entities branchlocations
Number of branches (branches)		430				430
Maximum Period Of Fair Value Refinement After Transaction Closing Date		1 year
Number Of Entities Assets Were Acquired And Liabilities Were Assumed From						6
Minimum Sustained Performance For Non Accrual Status Loans To Accrue Interest		6 years
Accretable yield - reclassifications from nonaccretable difference		$ 325,013,000	$ 222,772,000
Minimum Amount Of Covered Loans That If Impaired After Acquisition Date Are Subject To Impairment Analysis		1,000,000				1,000,000
Weighted Average Number of Shares Outstanding, Basic (shares)		10,376,445	10,434,453	10,434,453
Mortgage Loans on Real Estate, Cost of Mortgages Sold		509,647,000	583,750,000	753,172,000	250,000,000
Increase (Decrease) in Notes Receivables	97,291,000
Increase Decrease In Debt	86,926,000
Removal Of Carrying Value Of Residual Interest Strip	1,287,000
Increase (Decrease) in Deferred Income Taxes	3,456,000
Allowance for Loan and Lease Losses, Period Increase (Decrease)	681,000	(189,898,000)	(88,717,000)	(64,651,000)
Servicing Asset at Amortized Value, Other Changes that Affect Balance, Amount	304,000	0	(304,000)	0
Adjustment To Retained Earnings	4,904,000
Trust Preferred Securities		$ 243,500,000				$ 243,500,000
Common Class A [Member]
Votes Per Share Of Common Stock (votes per share of common stock)		1
Common Class B [Member]
Votes Per Share Of Common Stock (votes per share of common stock)		16
Building [Member]
Property, Plant and Equipment, Useful Life, Minimum		25
Property, Plant and Equipment, Useful Life, Maximum		40
Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life, Minimum		3
Property, Plant and Equipment, Useful Life, Maximum		10
Software [Member]
Property, Plant and Equipment, Useful Life, Minimum		3
Property, Plant and Equipment, Useful Life, Maximum		10
Equipment [Member]
Property, Plant and Equipment, Useful Life, Minimum		3
Property, Plant and Equipment, Useful Life, Maximum		10