Quarterly report pursuant to Section 13 or 15(d)

Revolving Credit Facilities (Details)

v3.8.0.1
Revolving Credit Facilities (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Short-term Debt [Line Items]    
Revolving credit facilities $ 20,000 $ 20,000
Weighted average borrowing rate 5.67% 5.14%
Weighted average remaining maturity 261 days 351 days
Mortgage servicing rights, at fair value, pledged as collateral for borrowings $ 826,514 $ 584,247
Short-term Debt [Member]    
Short-term Debt [Line Items]    
Mortgage servicing rights, at fair value, pledged as collateral for borrowings $ 138,437 $ 159,506