SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Securities owned
Total assets measured at fair value	$ 17,548	$ 17,955
Securities sold not yet purchased
Securities sold not yet purchased	6,481	746
Contingent consideration	2,347
Mandatorily redeemable noncontrolling interests issued after November 5, 2003	2,278	2,285
Total liabilities measured at fair value	11,106	3,031
Common Stock
Securities owned
Total assets measured at fair value	6,872	16,667
Securities sold not yet purchased
Securities sold not yet purchased	5,395
Mutual funds [Member]
Securities owned
Total assets measured at fair value	3,013
Corporate bonds [Member]
Securities owned
Total assets measured at fair value	501	1,188
Securities sold not yet purchased
Securities sold not yet purchased	1,086	746
Partnership interests and other securities [Member]
Securities owned
Total assets measured at fair value	7,162	100
Fair Value, Inputs, Level 1 [Member]
Securities owned
Total assets measured at fair value	$ 10,360	$ 16,348
Securities sold not yet purchased
Contingent consideration
Mandatorily redeemable noncontrolling interests issued after November 5, 2003
Total liabilities measured at fair value	$ 5,395
Fair Value, Inputs, Level 1 [Member] | Common Stock
Securities owned
Total assets measured at fair value	6,846	$ 16,348
Securities sold not yet purchased
Securities sold not yet purchased	5,395
Fair Value, Inputs, Level 1 [Member] | Mutual funds [Member]
Securities owned
Total assets measured at fair value	3,013
Fair Value, Inputs, Level 1 [Member] | Corporate bonds [Member]
Securities owned
Total assets measured at fair value	$ 501
Securities sold not yet purchased
Securities sold not yet purchased
Fair Value, Inputs, Level 1 [Member] | Partnership interests and other securities [Member]
Securities owned
Total assets measured at fair value
Fair Value, Inputs, Level 2 [Member]
Securities owned
Total assets measured at fair value	$ 5,996	$ 1,288
Securities sold not yet purchased
Contingent consideration
Mandatorily redeemable noncontrolling interests issued after November 5, 2003
Total liabilities measured at fair value	$ 1,086	$ 746
Fair Value, Inputs, Level 2 [Member] | Common Stock
Securities owned
Total assets measured at fair value
Securities sold not yet purchased
Securities sold not yet purchased
Fair Value, Inputs, Level 2 [Member] | Mutual funds [Member]
Securities owned
Total assets measured at fair value
Fair Value, Inputs, Level 2 [Member] | Corporate bonds [Member]
Securities owned
Total assets measured at fair value		$ 1,188
Securities sold not yet purchased
Securities sold not yet purchased	$ 1,086	746
Fair Value, Inputs, Level 2 [Member] | Partnership interests and other securities [Member]
Securities owned
Total assets measured at fair value	5,996	100
Fair Value, Inputs, Level 3 [Member]
Securities owned
Total assets measured at fair value	1,192	319
Securities sold not yet purchased
Contingent consideration	2,347
Mandatorily redeemable noncontrolling interests issued after November 5, 2003	2,278	2,285
Total liabilities measured at fair value	4,625	2,285
Fair Value, Inputs, Level 3 [Member] | Common Stock
Securities owned
Total assets measured at fair value	$ 26	$ 319
Securities sold not yet purchased
Securities sold not yet purchased
Fair Value, Inputs, Level 3 [Member] | Mutual funds [Member]
Securities owned
Total assets measured at fair value
Fair Value, Inputs, Level 3 [Member] | Corporate bonds [Member]
Securities owned
Total assets measured at fair value
Securities sold not yet purchased
Securities sold not yet purchased
Fair Value, Inputs, Level 3 [Member] | Partnership interests and other securities [Member]
Securities owned
Total assets measured at fair value	$ 1,166