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NOTE 18 DERIVATIVE FINANCIAL INSTRUMENTS (Detail) - (Table 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
IRLCs
   
Derivative Balance $ 1,112,519  
Maturities (1,651,514)  
Derivative Balance 617,274  
Fair value of derivative assets (liabilities) at:    
Balance 4,652 5,781
Maturity Apr. 2013 - Jun. 2013  
IRLCs | Additions
   
Additions (Subtractions) to Derivative Assets 1,468,218  
IRLCs | Amortization
   
Additions (Subtractions) to Derivative Assets (227,171)  
IRLCs | Terminations
   
Additions (Subtractions) to Derivative Assets (84,778)  
U.S. Treasury Futures
   
Derivative Balance 109,000  
Maturities     
Derivative Balance     
Fair value of derivative assets (liabilities) at:    
Balance    (1,258)
U.S. Treasury Futures | Additions
   
Additions (Subtractions) to Derivative Assets 85,000  
U.S. Treasury Futures | Amortization
   
Additions (Subtractions) to Derivative Assets     
U.S. Treasury Futures | Terminations
   
Additions (Subtractions) to Derivative Assets (194,000)  
Forward Mortgage-Backed Securities Trades
   
Derivative Balance 1,638,979  
Maturities (2,940,387)  
Derivative Balance 706,560  
Fair value of derivative assets (liabilities) at:    
Balance (1,108) (1,719)
Maturity Mar. 2013 - May 2013  
Forward Mortgage-Backed Securities Trades | Additions
   
Additions (Subtractions) to Derivative Assets 4,479,506  
Forward Mortgage-Backed Securities Trades | Amortization
   
Additions (Subtractions) to Derivative Assets     
Forward Mortgage-Backed Securities Trades | Terminations
   
Additions (Subtractions) to Derivative Assets (2,471,538)  
Interest Rate Caps
   
Derivative Balance 1,025,000  
Maturities     
Derivative Balance 1,013,000  
Fair value of derivative assets (liabilities) at:    
Balance 123 168
Maturity Feb. 2015 - May 2016  
Interest Rate Caps | Additions
   
Additions (Subtractions) to Derivative Assets     
Interest Rate Caps | Amortization
   
Additions (Subtractions) to Derivative Assets (12,000)  
Interest Rate Swaps
   
Derivative Balance 1,495,955  
Maturities (232,174)  
Derivative Balance 2,438,781  
Fair value of derivative assets (liabilities) at:    
Balance (18,758) (10,836)
Maturity Mar. 2013 - May 2027  
Interest Rate Swaps | Additions
   
Additions (Subtractions) to Derivative Assets 1,280,000  
Interest Rate Swaps | Amortization
   
Additions (Subtractions) to Derivative Assets     
Interest Rate Swaps | Terminations
   
Additions (Subtractions) to Derivative Assets $ (105,000)