Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Measurement Inputs, Disclosure (Details)

v3.4.0.3
Fair Value, Measurement Inputs, Disclosure (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale Securities Categorized as Level 2 Assets 100.00%      
Assets Reported at Fair Value, Available-for-sale Securities 66.90%      
Mortgage Loans Held-for-sale Categorized as Level 2 Assets 81.30%      
Mortgage Loans Held-for-sale Categorized as Level 3 Assets 18.70%      
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 Categorized as Level 1 Assets (Liabilities) 100.00%      
Derivative, Notional Amount $ 26,390,596 $ 21,998,381 $ 33,709,043 $ 48,115,523
Forward Purchase Commitments Categorized as Level 2 Assets (Liabilities) 100.00%      
Collateralized Borrowings in Securitization Trust Categorized as Level 2 Liabilities 100.00%      
Available-for-sale Securities $ 9,584,454 7,825,320    
Mortgage servicing rights 446,170 493,688 410,229 452,006
Loan Purchase Commitments [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative, Notional Amount 252,212 286,120 $ 707,304 $ 554,838
Derivative Financial Instruments, Liabilities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative, Notional Amount 9,621,098 1,362,384    
Derivative, Fair Value, Net (77,038) (7,285)    
Derivative Financial Instruments, Liabilities [Member] | Loan Purchase Commitments [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative, Notional Amount 17,953 187,384    
Derivative, Fair Value, Net (12) (427)    
Fair Value, Measurements, Recurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale Securities 9,584,454 7,825,320    
Residential mortgage loans held-for-sale 387,259 811,431    
Residential mortgage loans held-for-investment in securitization trust 3,705,647 3,173,727    
Mortgage servicing rights 446,170 493,688    
Derivative assets 197,847 271,509    
Assets, Fair Value Disclosure 14,321,377 12,575,675    
Collateralized borrowings in securitization trust 2,809,627 2,000,110    
Derivative liabilities 77,038 7,285    
Liabilities, Fair Value Disclosure 2,886,665 2,007,395    
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale Securities 0 0    
Residential mortgage loans held-for-sale 0 0    
Residential mortgage loans held-for-investment in securitization trust 0 0    
Mortgage servicing rights 0 0    
Derivative assets 9,557 1,074    
Assets, Fair Value Disclosure 9,557 1,074    
Collateralized borrowings in securitization trust 0 0    
Derivative liabilities 3,328 1,324    
Liabilities, Fair Value Disclosure 3,328 1,324    
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale Securities 9,584,454 7,825,320    
Residential mortgage loans held-for-sale 314,962 764,319    
Residential mortgage loans held-for-investment in securitization trust 3,705,647 3,173,727    
Mortgage servicing rights 0 0    
Derivative assets 188,290 270,435    
Assets, Fair Value Disclosure 13,793,353 12,033,801    
Collateralized borrowings in securitization trust 2,809,627 2,000,110    
Derivative liabilities 73,710 5,961    
Liabilities, Fair Value Disclosure 2,883,337 2,006,071    
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale Securities 0 0    
Residential mortgage loans held-for-sale 72,297 47,112    
Residential mortgage loans held-for-investment in securitization trust 0 0    
Mortgage servicing rights 446,170 493,688    
Derivative assets 0 0    
Assets, Fair Value Disclosure 518,467 540,800    
Collateralized borrowings in securitization trust 0 0    
Derivative liabilities 0 0    
Liabilities, Fair Value Disclosure $ 0 $ 0