Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Rollforward of Mortgage Servicing Rights, at Fair Value (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]          
Mortgage servicing rights, at fair value, at beginning of period $ 747,580 $ 446,170 $ 693,815 $ 493,688  
Additions from purchases of mortgage servicing rights 196,920 55,938 273,876 106,211  
Additions from sales of residential mortgage loans 0 318 20 522  
Subtractions from sales of mortgage servicing rights (946) 0 (946) 0  
Changes in valuation inputs or assumptions used in the valuation model (26,111) (59,074) (22,929) (143,433)  
Other changes in fair value (19,951) (17,461) (37,948) (34,542)  
Other changes 533 1,922 (7,863) 5,367  
Mortgage servicing rights, at fair value, at end of period 898,025 $ 427,813 898,025 $ 427,813  
Mortgage servicing rights, at fair value, pledged as collateral for borrowings $ 166,038   $ 166,038   $ 180,948