Marketable Securities - Investment Income (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2026 |
Jan. 31, 2025 |
Jan. 31, 2024 |
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Interest income | $ 14,783 | $ 18,111 | $ 13,546 |
| Accretion/amortization of discount/premium, net | 951 | 2,079 | 2,077 |
| Investment income | $ 15,734 | $ 20,190 | $ 15,623 |
| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of accretion (amortization) of purchase discount (premium) on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|