SHARE-BASED COMPENSATION - Summary of Share-Based Compensation Expense Related to Share-Based Awards (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	$ 67,365	$ 59,967	$ 52,740
Excess tax benefit	(60,190)	(29,819)	(32,487)
Net decrease in net income	7,175	30,148	20,253
Cost of subscriptions, software services and maintenance
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	18,125	15,002	13,588
Selling, general and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share-based compensation expense	$ 49,240	$ 44,965	$ 39,152

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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