Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement [Line Items]
Total revenue	$ 1,515,892	$ 1,293,636	$ 1,095,250
Lease license
Statement [Line Items]
Total revenue	406,043	275,619	376,886
Perpetual license
Statement [Line Items]
Total revenue	293,587	301,098	248,078
Software licenses
Statement [Line Items]
Total revenue	699,630	576,717	624,964
Maintenance
Statement [Line Items]
Total revenue	760,574	676,883	440,428
Service
Statement [Line Items]
Total revenue	55,688	40,036	29,858
Maintenance and service
Statement [Line Items]
Total revenue	$ 816,262	$ 716,919	$ 470,286
Direct revenue, as a percentage of total revenue
Statement [Line Items]
Concentration risk, percentage	77.10%	77.60%	75.20%
Indirect revenue, as a percentage of total revenue
Statement [Line Items]
Concentration risk, percentage	22.90%	22.40%	24.80%