Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Measurement Inputs, Disclosure (Details)

v3.20.2
Fair Value, Measurement Inputs, Disclosure (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt Securities, Available-for-sale, Categorized as Level 2 Assets 99.98%          
Debt Securities, Available-for-sale, Categorized as Level 3 Assets 0.02%          
Assets Reported at Fair Value, Debt Securities, Available-for-sale 92.70%          
Mortgage Servicing Rights Categorized as Level 3 Assets 100.00%          
Over-the-Counter Derivatives Categorized as Level 2 Assets (Liabilities) 100.00%          
Other RMBS Classified as Derivatives Categorized as Level 2 Assets 100.00%          
Other Derivatives Categorized as Level 1 Assets (Liabilities) 100.00%          
Mortgage servicing rights $ 1,279,195 $ 1,505,163 $ 1,909,444 $ 1,800,826 $ 2,014,370 $ 1,993,440
Derivative assets, at fair value 110,527   188,051      
Derivative liabilities, at fair value 1,298   6,740      
Fair Value, Recurring [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 17,673,289   31,406,328      
Mortgage servicing rights 1,279,195   1,909,444      
Derivative assets, at fair value 110,527   188,051      
Total assets 19,063,011   33,503,823      
Derivative liabilities, at fair value 1,298   6,740      
Total liabilities 1,298   6,740      
Fair Value, 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      
Mortgage servicing rights 0   0      
Derivative assets, at fair value 37,705   8,513      
Total assets 37,705   8,513      
Derivative liabilities, at fair value 1,298   6,711      
Total liabilities 1,298   6,711      
Fair Value, 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 17,669,429   31,157,154      
Mortgage servicing rights 0   0      
Derivative assets, at fair value 72,822   179,538      
Total assets 17,742,251   31,336,692      
Derivative liabilities, at fair value 0   29      
Total liabilities 0   29      
Fair Value, 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 3,860   249,174      
Mortgage servicing rights 1,279,195   1,909,444      
Derivative assets, at fair value 0   0      
Total assets 1,283,055   2,158,618      
Derivative liabilities, at fair value 0   0      
Total liabilities $ 0   $ 0