STOCKHOLDERS' EQUITY - Restricted Stock Units, Performance Stock Units and Stock Options Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2026	Apr. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expense	$ 74,889	$ 68,655
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not yet recognized amount	$ 754,400
Cost not yet recognized, period for recognition	3 years 2 months 12 days
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not yet recognized amount	$ 4,400
Cost not yet recognized, period for recognition	1 year 1 month 6 days
Share-based payment arrangement, expense	$ 2,300	$ 1,200
Performance Shares \| Observo
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	100.00%
Share-based payment arrangement, expense	$ 300
Performance Shares \| Prompt And Observo
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expense	$ 400
Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.00%
Award vesting period (in years)	1 year
Performance Shares \| Minimum \| Prompt And Observo
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	0.00%
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	225.00%
Award vesting period (in years)	4 years
Performance Shares \| Maximum \| Prompt And Observo
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	200.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost not yet recognized amount	$ 5,100
Cost not yet recognized, period for recognition	8 months 12 days
Stock options \| Observo
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expense	$ 5,700

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

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