Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Measurement Inputs, Disclosure (Details)

v3.19.3
Fair Value, Measurement Inputs, Disclosure (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Debt Securities, Available-for-sale, Categorized as Level 2 Assets 99.50%          
Debt Securities, Available-for-sale, Categorized as Level 3 Assets 0.50%          
Assets Reported at Fair Value, Debt Securities, Available-for-sale 93.80%          
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 $ 1,651,556 $ 1,800,826 $ 1,993,440 $ 1,664,024 $ 1,450,261 $ 1,086,717
Derivative assets, at fair value 230,620   319,981      
Derivative liabilities, at fair value 17,201   820,590      
Fair Value, Recurring [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 28,318,558   25,552,604      
Mortgage servicing rights 1,651,556   1,993,440      
Derivative assets, at fair value 230,620   319,981      
Total assets 30,200,734   27,866,025      
Derivative liabilities, at fair value 17,201   820,590      
Total liabilities 17,201   820,590      
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 16,656   21,602      
Total assets 16,656   21,602      
Derivative liabilities, at fair value 17,188   0      
Total liabilities 17,188   0      
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 28,172,321   25,447,447      
Mortgage servicing rights 0   0      
Derivative assets, at fair value 213,964   298,379      
Total assets 28,386,285   25,745,826      
Derivative liabilities, at fair value 13   820,590      
Total liabilities 13   820,590      
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 146,237   105,157      
Mortgage servicing rights 1,651,556   1,993,440      
Derivative assets, at fair value 0   0      
Total assets 1,797,793   2,098,597      
Derivative liabilities, at fair value 0   0      
Total liabilities $ 0   $ 0