Quarterly report pursuant to Section 13 or 15(d)

Revolving Credit Facilities (Details)

v3.19.1
Revolving Credit Facilities (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Line of Credit Facility [Line Items]    
Revolving credit facilities $ 375,294 $ 310,000
Weighted average borrowing rate 5.50% 5.60%
Weighted average remaining maturity 3 years 7 months 2 days 4 years 3 months
Mortgage servicing rights, at fair value, pledged as collateral for borrowings $ 1,600,000 $ 1,100,000
Line of Credit [Member]    
Line of Credit Facility [Line Items]    
Mortgage servicing rights, at fair value, pledged as collateral for borrowings $ 824,300 $ 458,200