RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($) leasedOfficeSpace
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	$ 149	$ 178
Number of leased office space exited | leasedOfficeSpace					8
ROU asset group impairments and adjustments				$ 26,500	$ 26,500
Operating lease, ROU asset, impairment loss					22,200
Leasehold improvements, impairment loss					4,300
Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	423
Restructuring reserve	2,287		$ 5,434
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	100		7,900	4,200
Employee Severance | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	149
Restructuring reserve	422		3,529
Employee Severance | Restructuring Activity 2025
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	300
Employee Severance | Restructuring Activity 2024
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	100
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments					$ 2,500
Restructuring reserve	1,100
Facility Closing | Restructuring Activity 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	7,900
Restructuring reserve related charges	500
Restructuring reserve	800
United States
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					5
United States | Employee Severance | Restructuring Activity 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			200	4,000
United States | Employee Severance | Restructuring Activity 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			200
United States | Employee Severance | Restructuring Activity 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments				4,000
United States, Europe and Asia Pacific | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve related charges			$ 7,700
United States and Europe | Employee Severance | Restructuring Activity 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments				200
United States and Europe | Employee Severance | Restructuring Activity 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments				$ 200
Boston
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					1
Philadelphia
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					1
Phoenix
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					1
San Francisco
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					2
Europe
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					3
The Netherlands
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					1
London, England
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					1
Paris, France
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace					1
San Francisco and Phoenix | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring reserve related charges	$ (200)