Subsequent Events (Details) - USD ($) $ in Thousands				3 Months Ended
	Apr. 05, 2021	Apr. 02, 2021	Mar. 25, 2021	Mar. 31, 2021	Mar. 31, 2020
Subsequent Event [Line Items]
Proceeds from issuance of convertible senior notes, net of issuance costs				$ 488,691	$ 0
Cost incurred				54,450
0.5% Convertible Senior Notes Due 2027
Subsequent Event [Line Items]
Aggregated principal amount				500,000
0.5% Convertible Senior Notes Due 2027 | Senior Notes
Subsequent Event [Line Items]
Aggregated principal amount				$ 500,000
Proceeds from issuance of convertible senior notes, net of issuance costs			$ 488,234
Common stock covered under capped calls (in shares)			5,346,000
Subsequent Event | RentPath Holdings Acquisition
Subsequent Event [Line Items]
Escrow deposit		$ 60,800
Payments for asset acquisitions		$ 608,000
Subsequent Event | 0.5% Convertible Senior Notes Due 2027 | Senior Notes
Subsequent Event [Line Items]
Aggregated principal amount	$ 75,000
Proceeds from issuance of convertible senior notes, net of issuance costs	$ 73,270
Common stock covered under capped calls (in shares)	801,900
Cost incurred	$ 8,168