Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Operating lease liabilities, related party current	$ 1.2	$ 1.2
Tax receivable agreement, related party	141.3	141.1
Operating lease liabilities, related party non current	$ 2.9	$ 3.2
Class A Common Stock
Shareholders'/members' equity (deficit):
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	200,000,000	200,000,000
Common stock shares issued (in shares)	41,361,208	41,233,954
Common stock shares outstanding (in shares)	41,361,208	41,233,954
Class B Common Stock
Shareholders'/members' equity (deficit):
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	40,000,000	40,000,000
Common stock shares issued (in shares)	34,163,538	34,163,538
Common stock shares outstanding (in shares)	34,163,538
Class C Common Stock
Shareholders'/members' equity (deficit):
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	4,000,000	4,000,000
Common stock shares issued (in shares)	2,317,955	2,321,955
Common stock shares outstanding (in shares)	2,317,955	2,321,955
Class D Common Stock
Shareholders'/members' equity (deficit):
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock shares authorized (in shares)	32,000,000	32,000,000
Common stock shares issued (in shares)	4,339,978	4,354,978
Common stock shares outstanding (in shares)	4,339,978	4,354,978