Debt and Financing Arrangements - Interest Expense (Details) - Convertible Senior Notes - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Debt Instrument [Line Items]
Contractual interest expense	$ 1,510	$ 1,706	$ 4,829	$ 4,938
Amortization of debt issuance costs	590	671	1,921	1,950
Total interest expense related to the Notes	$ 2,100	$ 2,377	$ 6,750	$ 6,888

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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