Annual report pursuant to Section 13 and 15(d)

Rollforward of Mortgage Servicing Rights, at Fair Value (Details)

v3.10.0.1
Rollforward of Mortgage Servicing Rights, at Fair Value (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]      
Mortgage servicing rights, at fair value, at beginning of period $ 1,086,717 $ 693,815 $ 493,688
Additions from purchases of mortgage servicing rights 988,283 499,866 312,580
Additions from sales of residential mortgage loans 0 20 924
Subtractions from sales of mortgage servicing rights 0 (946) (61,511)
Changes in valuation inputs or assumptions used in the valuation model 80,209 6,339 16,572
Other changes in fair value (149,879) (96,781) (78,729)
Other changes (11,890) (15,596) 10,291
Mortgage servicing rights, at fair value, at end of period 1,993,440 1,086,717 $ 693,815
Mortgage servicing rights, at fair value, pledged as collateral for borrowings $ 1,100,000 $ 600,000