Equity-Based Compensation - PSU awards (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) tranche $ / shares shares	Jan. 31, 2020 USD ($)
Additional disclosures
Cash awards granted		$ 3.3
Number of tranches | tranche	3
Cash awards accrued in other liabilities	$ 1.2
Performance share unit awards
Number of units
Forfeited (in shares) | shares	(458,485)
Total awarded and unvested at the end of the period (in shares) | shares	2,078,798
Weighted average grant date fair value
Total awarded and unvested at the end of the period (in dollars per share) | $ / shares	$ 14.85
Additional disclosures
Additional equity compensation to be recognized over the remaining period	$ 11.0
Weighted average period for recognizing unrecognized stock-based compensation expense	1 year 4 months 24 days