Business Combinations - Summary of Pro Forma Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues	$ 873.6	$ 557.4
Net (loss) income	(24.0)	$ (35.4)
FlaglerCE Holdings LLC
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues	25.8
Net (loss) income	(0.1)
Consolidate Entities And Flagler C E Holdings L L C
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues	899.4
Net (loss) income	$ (24.1)