Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Measurement Inputs, Disclosure (Details)

v3.19.2
Fair Value, Measurement Inputs, Disclosure (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Mar. 31, 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 99.30%          
Debt Securities, Available-for-sale, Categorized as Level 3 Assets 0.70%          
Assets Reported at Fair Value, Debt Securities, Available-for-sale 93.60%          
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 $ 1,800,826 $ 2,014,370 $ 1,993,440 $ 1,450,261 $ 1,301,023 $ 1,086,717
Derivative assets, at fair value 246,995   319,981      
Derivative liabilities, at fair value 255   820,590      
Fair Value, Recurring [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Available-for-sale securities 30,186,079   25,552,604      
Mortgage servicing rights 1,800,826   1,993,440      
Derivative assets, at fair value 246,995   319,981      
Total assets 32,233,900   27,866,025      
Derivative liabilities, at fair value 255   820,590      
Total liabilities 255   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 38,492   21,602      
Total assets 38,492   21,602      
Derivative liabilities, at fair value 170   0      
Total liabilities 170   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 29,968,869   25,447,447      
Mortgage servicing rights 0   0      
Derivative assets, at fair value 208,503   298,379      
Total assets 30,177,372   25,745,826      
Derivative liabilities, at fair value 85   820,590      
Total liabilities 85   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 217,210   105,157      
Mortgage servicing rights 1,800,826   1,993,440      
Derivative assets, at fair value 0   0      
Total assets 2,018,036   2,098,597      
Derivative liabilities, at fair value 0   0      
Total liabilities $ 0   $ 0