Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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Gross number of share options (or share units) granted during the period.

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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STOCK-BASED INCENTIVE COMPENSATION (Details)			12 Months Ended
STOCK-BASED INCENTIVE COMPENSATION (Details)	Feb. 03, 2020 shares	Aug. 06, 2019 $ / shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	May 03, 2018 shares
Stock Options
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Value of shares surrendered to satisfy tax withholding obligations			$ 400,000
Unrecognized compensation expense			$ 200,000
Weighted average period of recognition			1 year 6 months
Vesting period			3 years
Share-based compensation expense			$ 400,000
Options granted in period \| shares			0
Restricted Stock
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares granted \| $ / shares		$ 2.67	$ 10.72
Value of shares surrendered to satisfy tax withholding obligations			$ 2,100,000
Unrecognized compensation expense			$ 2,400,000
Weighted average period of recognition			2 years 8 months
Value of shares vested in period			$ 1,900,000	$ 0	$ 0
Share-based compensation expense				1,900,000
HC I Incentive Units
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based compensation expense			1,900,000	$ 2,100,000	$ 1,400,000
The 2018 Plan
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares authorized (in shares) \| shares						16,406,939
Subsequent Event
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock conversion ratio	0.25
Subsequent Event \| The 2018 Plan
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of shares authorized (in shares) \| shares	4,101,735
Treasury Stock \| Stock Options
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Value of shares surrendered to satisfy tax withholding obligations			400,000
Treasury Stock \| Restricted Stock
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Value of shares surrendered to satisfy tax withholding obligations			$ 2,000,000
Minimum
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercisable range of years			7 years
Minimum \| Restricted Stock
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Vesting period			1 year
Maximum
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercisable range of years			10 years
Maximum \| Restricted Stock
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Vesting period			3 years
Director \| Restricted Stock
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Vesting period			1 year