SEGMENT INFORMATION SEGMENT INFORMATION - RECONCILATION OF SEGMENT CONTRIBUTION TO OPERATING INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2020	Apr. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Amortization of intangible assets	$ 12,700	$ 14,400
Stock-based compensation expense	14,184	17,103
Total reconciling items, net	178,795	186,603
Operating Income	6,174	14,468
Segment Amount
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income	90,761	106,108
Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Revenue Adjustments	4,354	8,899
Amortization of intangible assets	12,674	14,420
Stock-based compensation expense	14,184	17,103
Acquisition, integration, restructuring, and other unallocated expenses	10,034	7,364
Total reconciling items, net	84,587	91,640
Shared Support Expenses
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Shared Support Expenses	$ 43,341	$ 43,854

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

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