Summary of Significant Accounting Policies - VIE & Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019	Jan. 01, 2019
Leases
Right-of-use asset			$ 12,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]			Other Assets
Operating Lease, Liability	$ 16,775
Operating Lease, Liability, Statement of Financial Position [Extensible List]			Accounts Payable and Accrued Liabilities
Variable Interest Entities
REO assets as a percent of consolidated VIE assets		2.00%
Loans as a percent of consolidated VIE assets		98.00%
Fair Value Measurements
Permitted reinvestment under static investment in VIEs		$ 0