Business Combinations - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Apr. 02, 2021	Sep. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill		$ 407,228	$ 9,186
RentPath holdings
Business Acquisition [Line Items]
Cash and cash equivalents	$ 334
Accounts receivable	7,726
Prepaid expenses	5,483
Other current assets	416
Property and equipment, net	3,103
Operating lease right-of-use assets	12,330
Intangible assets	211,000
Goodwill	398,042
Total assets	638,434
Accounts payable	(1,355)
Accrued liabilities	(9,412)
Lease liabilities	(1,264)
Lease liabilities and deposits, noncurrent	(11,066)
Payroll tax liabilities, noncurrent	(1,030)
Deferred tax liabilities	(6,307)
Total liabilities	(30,434)
Total purchase consideration	$ 608,000