Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net services revenue ($227.5 million and $661.4 million for the three and nine months ended September 30, 2021, respectively, and $193.4 million and $608.2 million for the three and nine months ended September 30, 2020, respectively, from related party)	$ 379.7	$ 307.2	$ 1,075.7	$ 942.4
Operating expenses:
Cost of services	304.0	255.2	858.2	757.4
Selling, general and administrative	33.2	25.7	87.8	74.5
Other expenses	11.4	15.7	34.2	42.4
Total operating expenses	348.6	296.6	980.2	874.3
Income from operations	31.1	10.6	95.5	68.1
Net interest expense	6.5	4.4	13.8	13.0
Income before income tax provision	24.6	6.2	81.7	55.1
Income tax provision	7.6	1.0	20.5	16.6
Net income	$ 17.0	$ 5.2	$ 61.2	$ 38.5
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.06	$ 0	$ (2.03)	$ 0.10
Diluted (in dollars per share)	$ 0.05	$ 0	$ (2.03)	$ 0.08
Weighted average shares used in calculating net income (loss) per common share:
Basic (in shares)	278,655,269	115,976,377	262,209,929	115,164,631
Diluted (in shares)	320,617,086	115,976,377	262,209,929	171,178,086
Consolidated statements of comprehensive income
Net income	$ 17.0	$ 5.2	$ 61.2	$ 38.5
Other comprehensive income (loss):
Net change on derivatives designated as cash flow hedges, net of tax	0.5	1.1	0.9	(2.5)
Foreign currency translation adjustments	0.0	1.4	(1.0)	(0.9)
Total other comprehensive income (loss), net of tax	0.5	2.5	(0.1)	(3.4)
Comprehensive income	17.5	7.7	61.1	35.1
Basic:
Net income	17.0	5.2	61.2	38.5
Less dividends on preferred shares	0.0	(5.6)	(592.3)	(16.6)
Less income allocated to preferred shareholders	0.0	0.0	0.0	(10.9)
Net income (loss) available/allocated to common shareholders - basic	17.0	(0.4)	(531.1)	11.0
Diluted:
Net income	17.0	5.2	61.2	38.5
Less dividends on preferred shares	0.0	(5.6)	(592.3)	(16.6)
Less income allocated to preferred shareholders	0.0	0.0	0.0	(8.7)
Net income (loss) available/allocated to common shareholders - diluted	$ 17.0	$ (0.4)	$ (531.1)	$ 13.2