Stock Compensation Plans and Share-Based Compensation Awards - RSU (Details) - USD ($) $ / shares in Units, $ in Thousands	5 Months Ended	12 Months Ended
	May 23, 2018	Dec. 31, 2018
Stock Compensation Plans and Share-Based Compensation Awards
Share-based compensation expense		$ 55,519
RSAs
Stock Compensation Plans and Share-Based Compensation Awards
Share-based compensation expense	$ 0	$ 9,200
Number outstanding
Granted (in shares)		607,000
Vested (in shares)		(564,000)
Forfeited (in shares)		(1,000)
Balance at end of period (in shares)		42,000
Weighted average grant date fair value
Granted (in dollars per share)		$ 16.00
Vested (in dollars per share)		16.00
Forfeited (in dollars per share)		16.00
Balance at end of period (in dollars per share)		$ 16.00
RSUs
Stock Compensation Plans and Share-Based Compensation Awards
Share-based compensation expense		$ 1,400
Number outstanding
Granted (in shares)		527
Forfeited (in shares)		(21)
Balance at end of period (in shares)		506
Weighted average grant date fair value
Granted (in dollars per share)		$ 16.29
Forfeited (in dollars per share)		16.00
Balance at end of period (in dollars per share)		$ 16.30
Unrecognized compensation expense		$ 6,900
Vesting period		4 years
Weighted average period outstanding for unvested RSUs		3 years 3 months 18 days