Consolidation - Revenue and Expenses of Consolidated Investment Product (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Expenses:
Other operating expenses	$ 18,723	$ 16,862
Noncontrolling interest	(722)	(527)
Net Income (Loss) Attributable to Common Stockholders	19,662	$ 21,216
CLOs
Income:
Realized and unrealized gain (loss), net	(5,719)
Interest income	26,882
Total revenues	21,163
Expenses:
Other operating expenses	305
Interest expense	19,701
Total Expense	20,006
Noncontrolling interest	(453)
Net Income (Loss) Attributable to Common Stockholders	$ 704