Stockholders' Equity (Details) - USD ($)	2 Months Ended	9 Months Ended	56 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Jul. 24, 2020	Oct. 22, 2018
Class A common stock
Equity, Class of Treasury Stock [Line Items]
Additional authorized repurchase amount					$ 250,000,000
Authorized repurchase amount	$ 500,000,000	$ 500,000,000	$ 500,000,000
Shares repurchased pursuant to repurchase authorizations (in shares)		563,953	3,719,048
Shares repurchased pursuant to repurchase authorizations, average price (in dollars per share)		$ 81.71	$ 84.02
Remaining authorized repurchase amount	$ 187,500,000	$ 187,500,000	$ 187,500,000
Class A common stock | Restricted Stock Units (RSUs)
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased		30,143
Average purchase price per share (in dollars per share)		$ 147.12
Amount related to tax withholdings associated with vesting of RSUs		$ 4,400,000
ATM Equity Offering
Equity, Class of Treasury Stock [Line Items]
Sale of stock, maximum aggregate gross sales price				$ 400,000,000
Sale of stock, number of shares issued (in shares)	0