CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 6.8	$ 5.5
Preferred Stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred Stock, shares authorized (in shares)	100,000	100,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common Stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, shares authorized (in shares)	240,000,000	240,000,000
Common Stock, shares outstanding (in shares)	77,574,172	80,392,662
Common Stock, shares issued (in shares)	77,574,172	80,392,662
Non-voting Common Stock
Common Stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, shares authorized (in shares)	7,125,000	7,125,000
Common Stock, shares outstanding (in shares)	0	0
Common Stock, shares issued (in shares)	0	0
Class C Common Stock
Common Stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common Stock, shares authorized (in shares)	20,000,000	20,000,000
Common Stock, shares outstanding (in shares)	0	0
Common Stock, shares issued (in shares)	0	0