COMPENSATION EXPENSE (Summary of RSU and Restricted LLC Unit Activity) (Details)	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Restricted Stock Units (RSUs)
Number of RSUs
Beginning Balance (in shares) | shares	172,971
Granted (in shares) | shares	118,197
Forfeited (in shares) | shares	(17,149)
Vested (in shares) | shares	(72,435)
Ending Balance (in shares) | shares	201,584
Weighted Average Grant Date Fair Value
Beginning Balance (in dollars per share) | $ / shares	$ 53.86
Granted (in dollars per share) | $ / shares	4.98
Forfeited (in dollars per share) | $ / shares	31.91
Vested (in dollars per share) | $ / shares	49.54
Ending Balance (in dollars per share) | $ / shares	$ 28.61
Restricted Stock Units (RSUs), LLC
Number of RSUs
Beginning Balance (in shares) | shares	237,973
Granted (in shares) | shares	41,858
Forfeited (in shares) | shares	0
Vested (in shares) | shares	0
Ending Balance (in shares) | shares	279,831
Weighted Average Grant Date Fair Value
Beginning Balance (in dollars per share) | $ / shares	$ 38.27
Granted (in dollars per share) | $ / shares	20.76
Forfeited (in dollars per share) | $ / shares	0.00
Vested (in dollars per share) | $ / shares	0.00
Ending Balance (in dollars per share) | $ / shares	$ 35.65