GOODWILL AND INTANGIBLE ASSETS (Goodwill) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 143,786,000	$ 143,895,000
Foreign currency translation	69,000		$ (109,000)
Goodwill, ending balance	143,855,000	143,786,000	143,895,000
Goodwill impairment	0	0
Credit Group
Goodwill [Roll Forward]
Goodwill, beginning balance	32,196,000	32,196,000
Foreign currency translation	0		0
Goodwill, ending balance	32,196,000	32,196,000	32,196,000
Private Equity Group
Goodwill [Roll Forward]
Goodwill, beginning balance	58,600,000	58,600,000
Foreign currency translation	0		0
Goodwill, ending balance	58,600,000	58,600,000	58,600,000
Real Estate Group
Goodwill [Roll Forward]
Goodwill, beginning balance	52,990,000	53,099,000
Foreign currency translation	69,000		(109,000)
Goodwill, ending balance	$ 53,059,000	$ 52,990,000	$ 53,099,000