Business Combinations - Summary of Preliminary Purchase Price (Parenthetical) (Details) - CamberView - $ / shares shares in Millions	Mar. 15, 2019	Oct. 01, 2018
Partnership Units
Business Acquisition [Line Items]
Business acquisition, shares issued of common stock	0.1	0.1
Business acquisition, closing stock price/fair value	$ 37.44	$ 47.53
Class A Common Stock
Business Acquisition [Line Items]
Business acquisition, shares issued of common stock	0.1	1.4
Business acquisition, closing stock price/fair value	$ 40.61	$ 51.55