INCOME TAXES - Reconciliation of Effective Tax Rate (Details)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense at U.S. federal statutory rate	21.00%	35.00%	35.00%
State and local income taxes, net of federal income tax benefit	4.80%	3.80%	4.80%
Excess tax benefits from share-based compensation	(1.60%)	(3.50%)	(0.00%)
Tax rate change	0.00%	26.50%	0.00%
Other items, net	0.20%	0.20%	(0.90%)
Income tax expense/(benefit)	24.40%	62.00%	38.90%

Effective Income Tax Rate Reconciliation, Excess Tax Benefit, Share-based Compensation, Percent

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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 income tax rates.

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Percentage of the difference, between reported income tax expense (benefit) and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, that is attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority interest income (expense), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, change in enacted tax rate, prior year income taxes, change in deferred tax asset valuation allowance, and other adjustments.

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