Stock-Based Compensation - Stock-Based Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	$ 145,615	$ 116,190	$ 83,346
Related income tax benefits	(56,485)	(47,454)	(34,518)
Stock-based compensation expense, net of taxes	$ 89,130	$ 68,736	$ 48,828
Basic earnings per share (in dollars per share)	$ (1.04)	$ (0.82)	$ (0.58)
Diluted earnings per share (in dollars per share)	$ (1.02)	$ (0.80)	$ (0.57)
Maintenance and service
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	$ 13,626	$ 8,494	$ 5,224
Selling, general and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	73,491	60,639	47,099
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	$ 58,498	$ 47,057	$ 31,023