Consolidation - Revenue and Expenses of Consolidated Investment Product (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Expenses:
Other operating expenses	$ 16,862	$ 13,226
Noncontrolling interest	(527)	(718)
Net Income (Loss) Attributable to Common Stockholders	21,216	$ 10,943
CLOs
Income:
Realized and unrealized gain (loss), net	4,037
Interest income	21,087
Other income	0
Total revenues	25,124
Expenses:
Other operating expenses	396
Interest expense	14,549
Total Expense	14,945
Noncontrolling interest	(673)
Net Income (Loss) Attributable to Common Stockholders	$ 9,506