Stock-Based Compensation Expense and Its Net Impact on Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Employee Service Share-Based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	$ 42,885	$ 34,130	$ 78,004	$ 65,071
Related income tax benefits	(8,783)	(10,883)	(51,408)	(36,789)
Stock-based compensation expense, net of taxes	$ 34,102	$ 23,247	$ 26,596	$ 28,282
Basic earnings per share	$ (0.39)	$ (0.27)	$ (0.31)	$ (0.33)
Diluted earnings per share	$ (0.39)	$ (0.27)	$ (0.30)	$ (0.32)
Maintenance and service
Employee Service Share-Based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	$ 3,519	$ 3,464	$ 7,081	$ 6,330
Selling, general and administrative
Employee Service Share-Based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	23,515	16,319	40,738	31,463
Research and development
Employee Service Share-Based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before taxes	$ 15,851	$ 14,347	$ 30,185	$ 27,278