Accrued Liabilities (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Accrued salaries and related expenses	$ 37,642,000	$ 37,642,000	$ 43,155,000
Accrued severance	3,709,000	3,709,000	3,377,000
Accrued taxes	69,103,000	69,103,000	27,232,000
Accrued expenses	47,470,000	47,470,000	57,474,000
Accrued service credits	7,979,000	7,979,000	9,023,000
Accrued liabilities	165,903,000	165,903,000	$ 140,261,000
Severance costs	3,300,000	10,600,000
Payments		11,905,000
Accrued income taxes, net		41,900,000
COVID-19 Terminations
Restructuring Cost and Reserve [Line Items]
Severance costs	0	5,000,000.0
Payments	1,900,000	4,100,000
Severance costs
Restructuring Cost and Reserve [Line Items]
Payments	2,700,000	9,200,000
Severance costs
Restructuring Cost and Reserve [Line Items]
Payments	300,000	3,191,000
Cost Reduction Initiatives
Restructuring Cost and Reserve [Line Items]
Payments	500,000	1,900,000
Marketing Services
Restructuring Cost and Reserve [Line Items]
Severance costs	2,900,000	9,500,000
Marketing Services | COVID-19 Terminations
Restructuring Cost and Reserve [Line Items]
Severance costs		4,500,000
SaaS
Restructuring Cost and Reserve [Line Items]
Severance costs	$ 400,000	1,100,000
SaaS | COVID-19 Terminations
Restructuring Cost and Reserve [Line Items]
Severance costs		$ 500,000