RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended				24 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($) leasedOfficeSpace	Mar. 31, 2021 USD ($)	Mar. 31, 2024 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	$ 28	$ 1,283	$ 605	$ 2,754
Number of leased office space exited | leasedOfficeSpace							8
ROU asset group impairments and adjustments	78	$ 0	42	$ 1,946		$ 26,500	$ 26,500
Operating lease, ROU asset, impairment loss									$ 22,200
Leasehold improvements						4,300			$ 4,300
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			600			4,200		$ 1,700
Employee Severance | Restructuring Activity 2024
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	100		100
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments						2,800	$ 2,800
Restructuring reserve	1,500		1,500
Facility Closing | Forecast
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments					$ 2,800
Facility Closing | Restructuring Activity 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			7,300
Restructuring reserve	$ 700		700
United States
Restructuring Cost and Reserve [Line Items]
Number of leased office space exited | leasedOfficeSpace							5
United States | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve related charges			500
United States | Employee Severance | Restructuring Activity 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			$ 100
United States and Asia Pacific | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve related charges						4,000
United States and Europe | Employee Severance | Restructuring Activity 2021
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