Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Rollforward of Mortgage Servicing Rights, at Fair Value (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Servicing Asset at Fair Value, Amount [Roll Forward]      
Mortgage servicing rights, at fair value, at beginning of period $ 693,815 $ 493,688 $ 452,006
Additions from purchases of mortgage servicing rights 499,866 312,580 124,261
Additions from sales of residential mortgage loans 20 924 1,844
Subtractions from sales of mortgage servicing rights (946) (61,511) 0
Changes in valuation inputs or assumptions used in the valuation model 6,339 16,572 (51,634)
Other changes in fair value (96,781) (78,729) (47,950)
Other changes (15,596) 10,291 15,161
Mortgage servicing rights, at fair value, at end of period 1,086,717 693,815 $ 493,688
Mortgage servicing rights, at fair value, pledged as collateral for borrowings $ 584,247 $ 180,948