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Restructuring - Restructuring Charges (Details)	12 Months Ended
	Mar. 31, 2021 USD ($) office	Mar. 31, 2020 USD ($) office	Mar. 31, 2019 USD ($)
Restructuring and Related Activities [Abstract]
Employee severance and related costs	$ 19,040,000	$ 16,834,000	$ 12,133,000
Lease impairments related costs	1,684,000	2,761,000	0
Stock-based compensation	2,747,000	1,753,000	2,632,000
Total restructuring charges	$ 23,471,000	$ 21,348,000	$ 14,765,000
Number of leases related to lease impairment | office	7	6

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Amount of loss from impairment of right-of-use asset from operating lease.

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