GOODWILL AND INTANGIBLE ASSETS (Goodwill) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill
Goodwill, beginning balance	$ 143,724,000	$ 144,067,000
Foreign currency translation	171,000	(343,000)
Goodwill, ending balance	143,895,000	143,724,000	$ 144,067,000
Impairments of goodwill	0	0	0
Credit
Goodwill
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
Goodwill
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
Goodwill
Goodwill, beginning balance	52,928,000	53,271,000
Foreign currency translation	171,000	(343,000)
Goodwill, ending balance	$ 53,099,000	$ 52,928,000	$ 53,271,000