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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Stock-Based Compensation - Employee Grants (Details) - Restricted stock awards - shares		6 Months Ended	12 Months Ended
	Dec. 14, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock Based Compensation
Granted (in shares)			2,075,455	2,116,546
Vested (in shares)			825,764	1,242,930
2017 Plan \| CEO
Stock Based Compensation
Granted (in shares)			171,233
Vesting period	4 years
2017 Plan, Long-term incentive compensation \| Management
Stock Based Compensation
Granted (in shares)					450,356
Annual vesting percentage					33.00%
2017 Plan, Equity compensation plan \| Management
Stock Based Compensation
Granted (in shares)					866,708
Vesting (as a percent)		100.00%
2017 Plan, Equity compensation plan \| Management \| Minimum
Stock Based Compensation
Shares granted based on achievement of the 2017 MBP (as percent)					100.00%
2017 Plan, Equity compensation plan \| Management \| Maximum
Stock Based Compensation
Shares granted based on achievement of the 2017 MBP (as percent)					150.00%
2017 Plan, Equity compensation plan \| Board of Directors
Stock Based Compensation
Granted (in shares)					54,361
Vesting (as a percent)		100.00%
2017 Plan, Replacement awards \| Management
Stock Based Compensation
Granted (in shares)					394,052
Annual vesting percentage					33.00%
2017 Plan, Replacement awards \| Employees
Stock Based Compensation
Granted (in shares)					78,050
Annual vesting percentage					33.00%