SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table Text Block]

As of September 30, 2015 and December 31, 2014, the Company’s securities owned and securities sold not yet purchased at fair value consisted of the following securities:

	September 30, 2015		December 31, 2014
Securities owned
Common stocks	$	6,872	$	16,667
Mutual funds		3,013		—
Corporate bonds		501		1,188
Partnership interests and other securities		7,162		100
	$	17,548	$	17,955
Securities sold not yet purchased
Common stocks	$	5,395	$	—
Corporate bonds		1,086		746
	$	6,481	$	746

Schedule of Securities Owned and Sold, Not yet Purchased, at Fair Value [Table Text Block]

The following tables present information on the assets and liabilities measured and recorded at fair value on a recurring basis as of September 30, 2015 and December 31, 2014.

	Financial Assets Measured at Fair Value on a Recurring Basis at September 30, 2015, Using
	Fair Value at September 30, 2015		Quoted prices in active markets for identical assets (Level 1)		Other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Assets:
Securities owned
Common stocks	$	6,872	$	6,846	$	—	$	26
Mutual funds		3,013		3,013		—		—
Corporate bonds		501		501		—		—
Partnership interests and other securities		7,162		—		5,996		1,166
Total assets measured at fair value	$	17,548	$	10,360	$	5,996	$	1,192
Liabilities:
Securities sold not yet purchased
Common stocks	$	5,395	$	5,395	$	—	$	—
Corporate bonds		1,086		—		1,086		—
Contingent consideration		2,347		—		—		2,347
Mandatorily redeemable noncontrolling interests issued after November 5, 2003		2,278		—		—		2,278
Total liabilities measured at fair value	$	11,106	$	5,395	$	1,086	$	4,625

	Financial Assets Measured at Fair Value on a Recurring Basis at December 31, 2014, Using
	Fair Value at December 31, 2014		Quoted prices in active markets for identical assets (Level 1)		Other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Assets:
Securities owned
Common stocks	$	16,667	$	16,348	$	—	$	319
Corporate bonds		1,188		—		1,188		—
Partnership interests and other securities		100		—		100		—
Total assets measured at fair value	$	17,955	$	16,348	$	1,288	$	319
Liabilities:
Securities sold not yet purchased Corporate bonds	$	746	$	—	$	746	$	—
Mandatorily redeemable noncontrolling interests issued after November 5, 2003	$	2,285	$	—	$	—	$	2,285
Total liabilities measured at fair value	$	3,031	$	—	$	746	$	2,285

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

The changes in Level 3 fair value hierarchy during the nine months ended September 30, 2015 and 2014 is as follows:

	Level 3 Balance at Beginning of Period		Level 3 Changes During the Period										Level 3 Balance at End of Period
			Fair Value Adjustments		Relating to Undistributed Earnings			Purchases, Sales and Settlements			Transfer in and/or out of Level 3
Nine Months Ended September 30, 2015
Common stocks	$	319	$	—	$	—		$	(293	)	$	—	$	26
Partnership interests	$	—	$	41	$	—		$	1,125		$	—	$	1,166
Mandatorily redeemable noncontrolling interests issued after November 5, 2003	$	2,285	$	—	$	(7	)	$	—		$	—	$	2,278
Contingent consideration (1)	$	—	$	2,347	$	—		$	—		$	—	$	2,347
Nine Months Ended September 30, 2014
Mandatorily redeemable noncontrolling interests issued after November 5, 2003	$	2,273	$	—	$	(48	)	$	—		$	—	$	2,225