NON-CONTROLLING INTEREST AND INCOME (LOSS) PER SHARE (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Net income (loss) attributable to common stockholders
Net income (loss)	$ 34,019,000	$ (2,828,000)
Non-controlling interest	(13,623,000)	(114,000)
Net income (loss) attributable to common shareholders	20,396,000	(2,942,000)
Class A common stock
Basic income (loss) per share:
Net income (loss) attributable to common shareholders	$ 20,396,000	$ (2,942,000)
Weighted average shares of Class A common stock outstanding	47,436,555	46,211,599
Basic income (loss) per share	$ 0.43	$ (0.06)
Diluted income (loss) per share:
Net income (loss) attributable to common shareholders	$ 20,396,000	$ (2,942,000)
Weighted average shares of Class A common stock outstanding	47,436,555	46,211,599
Effect of dilutive stock options	2,573
Effect of dilutive unvested Class A common stock and restricted stock units	$ 2,044
Total	47,441,172	46,211,599
Diluted income (loss) per share	$ 0.43	$ (0.06)
Antidilutive shares		7,855
Market based stock options
Diluted income (loss) per share:
Antidilutive shares	155,000	155,000
Threshold period	90 days
Vesting period	5 years
Market based stock options | Minimum
Diluted income (loss) per share:
Threshold volume weighted average per share price trigger	$ 100
Focus LLC
LOSS PER SHARE
Focus LLC common units held by continuing owners	21,759,379		22,568,831
Common unit equivalents of outstanding vested and unvested incentive units held by continuing owners	3,623,660		7,614,402
Total common units and common unit equivalents attributable to non-controlling interest	25,383,039		30,183,233
Total common units and common unit equivalents of incentive units outstanding	73,190,068		76,858,416
Non-controlling interest allocation	34.70%		39.30%
Company's interest in Focus LLC	65.30%		60.70%
Convertible incentive units	19,369,928	18,048,706