RESTRUCTURING, IMPAIRMENT AND OTHER CHARGES - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended			12 Months Ended		18 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) leasedOfficeSpace	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments	$ 1,283	$ 5,803	$ 2,754		$ 7,449
ROU asset group impairments and adjustments	0	$ 5,358	1,946	$ 24,600	$ 15,528
Operating lease, ROU asset, impairment loss			1,700	20,500
Leasehold improvements	200		$ 200	4,100		$ 4,100		$ 200
Number of leased office space exited | leasedOfficeSpace			8
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			$ 2,800			$ 7,800	$ 1,700
Restructuring reserve	100		100					100
Employee Severance | Restructuring Activity 2024
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	1,900		1,900					1,900
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			400					3,300
Restructuring reserve related charges				$ 2,900
Restructuring reserve	2,200		2,200					2,200
Facility Closing | Restructuring Activity 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments			7,300
Restructuring reserve	$ 1,500		1,500					$ 1,500
United States and Asia Pacific | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve related charges			$ 2,700
United States and Europe | Employee Severance | Restructuring Activity 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges and adjustments							100
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							$ 1,700
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