Composition of certain financial statement captions - Schedule of Goodwill Roll-Forward (Details) $ in Thousands	3 Months Ended
Apr. 30, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill balance at beginning of period	$ 170,064
Goodwill from measurement period adjustments on acquisitions	(551)
Goodwill balance at end of period	$ 169,513

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