Description of Business and Summary of Significant Accounting Policies - Schedule of Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of services	$ 98,160	$ 117,976
Sales and marketing	76,540	89,292
General and administrative	41,279	49,562
Impairment charges	0	98
Depreciation and amortization	$ 19,718	37,823
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of services		99,620
Sales and marketing		75,353
General and administrative		44,132
Impairment charges		0
Depreciation and amortization		37,823
Revision of Prior Period, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of services		18,356
Sales and marketing		13,939
General and administrative		5,430
Impairment charges		98
Depreciation and amortization		$ (37,823)