INCOME TAXES - Reconciliation of Income Tax Provision Computed at Federal Statutory Rate to Effective Tax Rate (Detail)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	21.00%	21.00%	21.00%
State and local taxes, net of federal tax effect	(11.20%)	1.20%	4.20%
Foreign tax rates	14.30%	5.10%	4.20%
Permanent - other items	(2.10%)	(4.20%)	0.50%
Permanent - goodwill impairment	0.00%	(14.10%)	(9.10%)
CARES Act / Tax Act	79.20%	0.00%	(3.20%)
Valuation allowance	(26.50%)	(1.20%)	(7.50%)
Divestitures	(62.70%)	1.20%	0.00%
Stock-based compensation and executive compensation disallowance	(11.90%)	(1.00%)	1.20%
Other	0.10%	(3.40%)	(0.50%)
Effective tax rate	0.20%	4.60%	10.80%

Effective Income Tax Rate Reconciliation, CARES Act, Percent

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Effective income tax rate reconciliation nondeductible expense permanent goodwill impairment.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to disposition of a business not qualifying as a discontinued operation.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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