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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Additional Information (Details) - USD ($)					3 Months Ended
- Additional Information (Details) - USD ($)	Feb. 08, 2019	Feb. 08, 2019	Feb. 08, 2019	Feb. 08, 2019	Mar. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Common stock, par value (in dollars per share)					$ 0.01
Principal amount					$ 130,000,000	$ 334,473,000
Rejection damages					100,000
2019 Long Term Incentive Plan
Restructuring Cost and Reserve [Line Items]
Payment to fund General Unsecured Creditor pool				$ 1,200,000
Payment in Kind (PIK) Note \| 10% Secured PIK Notes due 2024
Restructuring Cost and Reserve [Line Items]
Principal amount	$ 80,000,000	$ 80,000,000	$ 80,000,000	$ 80,000,000	80,000,000	0
Stated interest rate	10.00%	10.00%	10.00%	10.00%
Payment in Kind (PIK) Note \| Former Holders Of Old Notes \| 10% Secured PIK Notes due 2024 \| Cancellation And Discharge Of Old Notes
Restructuring Cost and Reserve [Line Items]
Principal amount	$ 80,000,000	$ 80,000,000	$ 80,000,000	$ 80,000,000
Stated interest rate	10.00%	10.00%	10.00%	10.00%
Term Loan \| Line of Credit
Restructuring Cost and Reserve [Line Items]
Principal amount					50,000,000
Term Loan \| Line of Credit \| Exit Facility
Restructuring Cost and Reserve [Line Items]
Principal amount					$ 50,000,000	$ 0
Maximum borrowing capacity	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000
Preferred Stock
Restructuring Cost and Reserve [Line Items]
Number of shares reserved for issuance (in shares)	10,000,000	10,000,000	10,000,000	10,000,000
Common Class A \| Common Stock
Restructuring Cost and Reserve [Line Items]
Number of shares reserved for issuance (in shares)	64,999,998	64,999,998	64,999,998	64,999,998
Common Class A \| Common Stock \| Former Holders Of Old Notes \| Cancellation And Discharge Of Old Notes
Restructuring Cost and Reserve [Line Items]
New shares issued (in shares)		8,900,000
Common Class A \| Common Stock \| Class C Holder
Restructuring Cost and Reserve [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common Class B \| Common Stock \| Class B Holder
Restructuring Cost and Reserve [Line Items]
New shares issued (in shares)		1
Common Class C \| Common Stock \| Class C Holder
Restructuring Cost and Reserve [Line Items]
New shares issued (in shares)		1
Restricted Stock Units (RSUs) \| 2019 Long Term Incentive Plan
Restructuring Cost and Reserve [Line Items]
Grants in period (in units)		827,638.000
Employee Stock Option \| 2019 Long Term Incentive Plan
Restructuring Cost and Reserve [Line Items]
Grants in period (in shares)		263,599
Predecessor
Restructuring Cost and Reserve [Line Items]
Common stock, par value (in dollars per share)						$ 0.001
Predecessor \| Series B Preferred Stock
Restructuring Cost and Reserve [Line Items]
Series B cumulative convertible perpetual preferred stock interest rate	6.875%		6.875%