STOCKHOLDERS' EQUITY (Restricted Stock Activity) (Details) - Agent Growth Incentive Program - Restricted Stock - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Restricted Stock Shares
Restricted stock outstanding, beginning balance	6,776,218	7,745,754
Restricted stock granted	2,777,894	3,374,914
Restricted stock vested and issued	(1,980,870)	(2,989,266)
Restricted stock forfeited	(1,022,852)	(1,355,184)
Restricted stock outstanding, ending balance	6,550,390	6,776,218
Weighted Average Fair Value
Weighted average price - Restricted stock outstanding, beginning balance	$ 5.52	$ 5.82
Weighted average price - Restricted stock granted	9.11	4.62
Weighted average price - Restricted stock vested and issued	6.42	5.61
Weighted average price - Restricted stock forfeited	5.66	1.70
Weighted average price - Restricted stock outstanding, ending balance	$ 6.75	$ 5.52

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Weighted Average Fair Value [Abstract]

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 2
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