SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Securities owned
Total assets measured at fair value	$ 13,682	$ 17,955
Securities sold not yet purchased
Securities sold not yet purchased	8,057	746
Contingent consideration	2,302
Mandatorily redeemable noncontrolling interests issued after November 5, 2003	2,147	2,285
Total liabilities measured at fair value	12,506	3,031
Common stocks [Member]
Securities owned
Total assets measured at fair value	4,541	16,667
Securities sold not yet purchased
Securities sold not yet purchased	7,349
Mutual funds [Member]
Securities owned
Total assets measured at fair value	7,237
Corporate bonds [Member]
Securities owned
Total assets measured at fair value	819	1,188
Securities sold not yet purchased
Securities sold not yet purchased	708	746
Partnership interests and other securities [Member]
Securities owned
Total assets measured at fair value	1,085	100
Fair Value, Inputs, Level 1 [Member]
Securities owned
Total assets measured at fair value	$ 11,752	$ 16,348
Securities sold not yet purchased
Contingent consideration
Mandatorily redeemable noncontrolling interests issued after November 5, 2003
Total liabilities measured at fair value	$ 7,349
Fair Value, Inputs, Level 1 [Member] | Common stocks [Member]
Securities owned
Total assets measured at fair value	4,515	$ 16,348
Securities sold not yet purchased
Securities sold not yet purchased	7,349
Fair Value, Inputs, Level 1 [Member] | Mutual funds [Member]
Securities owned
Total assets measured at fair value	$ 7,237
Fair Value, Inputs, Level 1 [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 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	$ 1,904	$ 1,288
Securities sold not yet purchased
Contingent consideration
Mandatorily redeemable noncontrolling interests issued after November 5, 2003
Total liabilities measured at fair value	$ 708	$ 746
Fair Value, Inputs, Level 2 [Member] | Common stocks [Member]
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	$ 819	$ 1,188
Securities sold not yet purchased
Securities sold not yet purchased	708	746
Fair Value, Inputs, Level 2 [Member] | Partnership interests and other securities [Member]
Securities owned
Total assets measured at fair value	1,085	100
Fair Value, Inputs, Level 3 [Member]
Securities owned
Total assets measured at fair value	26	319
Securities sold not yet purchased
Contingent consideration	2,302
Mandatorily redeemable noncontrolling interests issued after November 5, 2003	2,147	2,285
Total liabilities measured at fair value	4,449	2,285
Fair Value, Inputs, Level 3 [Member] | Common stocks [Member]
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