Quarterly report pursuant to Section 13 or 15(d)

Mortgage Servicing Rights, at Fair Value - Summary of Servicing Portfolio and its Activities (Detail)

v3.22.2
Mortgage Servicing Rights, at Fair Value - Summary of Servicing Portfolio and its Activities (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
Dec. 31, 2021
Servicing Assets at Fair Value [Line Items]          
Servicing rights $ 29,494,649     $ 29,494,649 $ 39,299,416
Weighted average interest rate       3.32% 3.03%
Capitalized servicing rights [Member]          
Servicing Assets at Fair Value [Line Items]          
Beginning balance 34,058,558 $ 26,675,358 $ 22,269,362 $ 39,299,416 $ 22,269,362
Originations 3,375,623 5,139,859 6,312,227 7,632,904  
Purchases 0 5,537 866,806 0  
Sold MSRs (7,123,286) 0 (1,090,267) (15,492,020)  
Portfolio runoff (524,107) (987,056) (1,488,977) (1,329,775)  
Other (292,139) (241,511) (193,793) (615,876)  
Changes in fair value due to:          
Changes in fair value due to portfolio runoff and other (292,139) (241,511) (193,793) (615,876)  
Ending Balance 29,494,649 30,592,187 26,675,358 29,494,649 39,299,416
Mortgage Servicing Rights [Member]          
Servicing Assets at Fair Value [Line Items]          
Beginning balance 426,102 267,364 180,684 427,942 180,684
Originations 41,218 50,049 65,964 94,662  
Purchases 0 61 9,014 0  
Sold MSRs     (8,647) (203,295)  
Other (10,101) (10,485) (14,760) (21,623)  
Payoffs, sales and curtailments (95,643) 0      
Changes in fair value due to:          
Changes in market inputs or assumptions used in valuation model (2,570) (16,051) 35,109 61,320  
Changes in fair value due to portfolio runoff and other (10,101) (10,485) (14,760) (21,623)  
Ending Balance 359,006 $ 290,938 $ 267,364 359,006 427,942
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]          
Servicing Assets at Fair Value [Line Items]          
Servicing rights 27,446,915     27,446,915 37,079,995
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]          
Servicing Assets at Fair Value [Line Items]          
Servicing rights 995,944     995,944 1,109,962
Private Investors [Member]          
Servicing Assets at Fair Value [Line Items]          
Servicing rights $ 1,051,790     $ 1,051,790 $ 1,109,459