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Mortgage Servicing Rights - Schedule of Changes to MSR Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Changes to MSR Assets        
Fair value, beginning of period $ 6,691,341 $ 6,669,939 $ 6,439,787 $ 6,946,940
MSRs originated 345,545 314,840 568,342 519,400
MSRs sales (74,395) (594,463) (125,739) (676,001)
MSRs purchases 314,543 0 331,238 0
Changes in fair value        
Due to changes in valuation model inputs or assumptions 74,988 245,495 302,357 27,693
Due to collection/realization of cash flows (189,332) (192,179) (353,295) (374,400)
Total changes in fair value (114,344) 53,316 (50,938) (346,707)
Fair value, end of period $ 7,162,690 $ 6,443,632 $ 7,162,690 $ 6,443,632
Servicing asset, fair value, change in fair value, other, statement of income or comprehensive income Gain (Loss) on Sales of Loans, Net Gain (Loss) on Sales of Loans, Net Gain (Loss) on Sales of Loans, Net Gain (Loss) on Sales of Loans, Net