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Mortgage Servicing Rights, Net - Schedule of Servicing Fees and Escrow Interest (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Transfers and Servicing [Abstract]        
Servicing fees $ 28,250 $ 25,977 $ 54,915 $ 51,608
Escrow interest and placement fees 727 5,624 4,119 10,987
Ancillary fees 1,283 4,131 3,524 7,315
Total servicing fees and escrow interest $ 30,260 $ 35,732 $ 62,558 $ 69,910