Stockholders' Equity - Stock Repurchase Program (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Apr. 30, 2021	Nov. 05, 2020
Subsidiary, Sale of Stock [Line Items]
Value of shares repurchased	$ (145,806,000)	$ (29,203,000)
Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Additional shares authorized for repurchase			200,000,000
Treasury stock at cost
Subsidiary, Sale of Stock [Line Items]
Value of shares repurchased	$ 145,806,000	$ (29,203,000)
Common Class A
Subsidiary, Sale of Stock [Line Items]
Amount authorized to be repurchased				$ 300,000
Common Class A | Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Amount authorized to be repurchased			$ 500,000,000
Common Class A | Common Stock
Subsidiary, Sale of Stock [Line Items]
Number of shares repurchased	(10,401,000)	(1,619,000)