Goodwill and intangible assets - Summary of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 371,018	$ 265,153
Additions	117,932	103,565
Purchase accounting adjustments	0	2,300
Goodwill, ending balance	$ 488,950	$ 371,018

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details