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Note 8 MORTGAGE SERVICING (Detail) (USD $)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2012
Mar. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2008
Unpaid Principal Balance Of Loans Related To Servicing Asset At Amortized $ 15,200,000,000 $ 15,200,000,000      
Sales Price Of Mortgage Servicing Rights MSR 62,458,000 62,458,000 62,458,000    
Carrying Value of Servicing Assets Sold 51,298,000 51,298,000 51,298,000    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset 523,800,000 523,800,000 523,800,000 555,500,000  
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance 2,494,000 2,494,000 2,494,000 2,290,000 3,624,000
Servicing Asset at Amortized Value, Valuation Allowance     2,494,000 2,290,000  
Carrying Value Of High Loan To Value Stratum MSRs     204,000 214,000  
Servicing Asset at Fair Value, Amount $ 316,078,000 $ 316,078,000 $ 316,078,000 $ 340,015,000