FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

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

The following table summarizes the values of our investments measured at fair value on a recurring basis within the fair value hierarchy as of the dates indicated (in thousands):

	Level 1		Level 2		Level 3		Investments Measured at NAV (1)		Total
As of March 31, 2020:
Investments in trading securities	$	37,272	$	—	$	—	$	—	$	37,272
Private investment fund	—		—		—		263		263
Private equity	—		—		2,980		—		2,980
Total assets measured at fair value	$	37,272	$	—	$	2,980	$	263	$	40,515
As of December 31, 2019:
Investments in trading securities	$	50,324	$	—	$	—	$	—	$	50,324
Private investment fund	—		—		—		263		263
Private equity	—		—		3,975		—		3,975
Total assets measured at fair value	$	50,324	$	—	$	3,975	$	263	$	54,562
(1) Comprised of certain investments measured at fair value using net asset value ("NAV") as a practical expedient. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented on our Condensed Consolidated Balance Sheets.

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

The following table summarizes the changes in Level 3 investments measured at fair value on a recurring basis for the periods presented (in thousands):

	Fair Value using Significant Unobservable Inputs (Level 3)
	Three Months Ended March 31,
	2020		2019
Beginning balance	$	3,975	$	—
Unrealized gains (losses) on private investments	(995)		—
Ending balance	$	2,980	$	—