Quarterly report pursuant to Section 13 or 15(d)

Fair Value Fair Value, Measurement Inputs, Disclosure (Details)

v2.4.0.8
Fair Value Fair Value, Measurement Inputs, Disclosure (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Jun. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading Securities Categorized as Level 1 Assets 100.00%    
Avaialble-for-sale Securities Categorized as Level 2 Assets 100.00%    
Assets Reported at Fair Value, Available-for-sale Securities 81.20%    
Assets Reported at Fair Value, Trading Securities 6.40%    
Mortgage Loans Held-for-sale Categorized as Level 2 Assets 21.40%    
Mortgage Loans Held-for-sale Categorized as Level 3 Assets 78.60%    
Mortgage Loans Held-for-investment Categorized as Level 2 Assets 100.00%    
Mortgage Servicing Rights Categorized as Level 3 Assets 100.00%    
Interest Rate Swaps, Swaptions and Credit Default Swaps Categorized as Level 2 Assets (Liabilities) 100.00%    
Inverse Interest-only Securities Categorized as Level 2 Assets 100.00%    
Agency To-be-Announced Securities Categoized as Level 1 Assets (Liabilities) 100.00%    
Collateralized Borrowings in Securitization Trust Categorized as Level 2 Liabilities 100.00%    
Available-for-Sale Securities $ 12,672,233   $ 13,666,954
Trading Securities 1,000,625   1,002,062
Equity securities 0   335,638
Mortgage servicing rights 15,703 1,452 0
Fair Value, Measurements, Recurring [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-Sale Securities 12,672,233   13,666,954
Trading Securities 1,000,625   1,002,062
Equity securities     335,638
Mortgage loans held-for-sale 559,737   58,607
Mortgage loans held-for-investment in securitization trust 804,988    
Derivative assets 544,515   462,080
Mortgage servicing rights 15,703    
Assets, Fair Value Disclosure 15,597,801   15,525,341
Collateralized borrowings in securitization trust 649,082    
Derivative liabilities 73,827   129,294
Liabilities, Fair Value Disclosure 722,909   129,294
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-Sale Securities 0   0
Trading Securities 1,000,625   1,002,062
Equity securities     335,638
Mortgage loans held-for-sale 0   0
Mortgage loans held-for-investment in securitization trust 0    
Derivative assets 21,896   1,917
Mortgage servicing rights 0    
Assets, Fair Value Disclosure 1,022,521   1,339,617
Collateralized borrowings in securitization trust 0    
Derivative liabilities 34,634   239
Liabilities, Fair Value Disclosure 34,634   239
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-Sale Securities 12,672,233   13,665,083
Trading Securities 0   0
Equity securities     0
Mortgage loans held-for-sale 119,607   58,607
Mortgage loans held-for-investment in securitization trust 804,988    
Derivative assets 522,619   460,163
Mortgage servicing rights 0    
Assets, Fair Value Disclosure 14,119,447   14,183,853
Collateralized borrowings in securitization trust 649,082    
Derivative liabilities 39,193   129,055
Liabilities, Fair Value Disclosure 688,275   129,055
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
     
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-Sale Securities 0   1,871
Trading Securities 0   0
Equity securities     0
Mortgage loans held-for-sale 440,130   0
Mortgage loans held-for-investment in securitization trust 0    
Derivative assets 0   0
Mortgage servicing rights 15,703    
Assets, Fair Value Disclosure 455,833   1,871
Collateralized borrowings in securitization trust 0    
Derivative liabilities 0   0
Liabilities, Fair Value Disclosure $ 0   $ 0