Leases - Schedule of supplemental cash flow information (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of operating lease liabilities:
Operating cash flows used in operating leases	$ (13,490)	$ (14,067)	$ (12,520)
Operating cash flows provided by operating leases	0	3,733	9,940
Operating lease ROU assets obtained in exchange for new operating lease liabilities	$ 0	$ 12,803	$ 4,769