SHORT-TERM INVESTMENTS: (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Dec. 31, 2024 |
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| Short term investment: | |||
| Trading securities | $ 218.0 | $ 245.2 | |
| Weighted average interest rate (as a percent) | 4.50% | 4.70% | |
| Available-for-sale | $ 0.1 | $ 0.2 | |
| Weighted average interest rate (as a percent) | 0.80% | 0.90% | |
| Total | $ 218.2 | $ 245.3 | |
| Trading: | |||
| Interest earned | 9.6 | $ 7.7 | |
| Available-for-sale: | |||
| Interest earned | 48.7 | 27.3 | |
| Maximum | |||
| Available-for-sale: | |||
| Interest earned | $ 0.1 | $ 0.1 | |
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- Definition Represents the weighted average interest rate on debt and equity securities which are categorized neither as trading securities nor as held-to-maturity securities and that are intended be sold or will mature within one year from the balance sheet date or the normal operating cycle, whichever is longer. No definition available.
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- References No definition available.
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- Definition Represents the weighted average interest rate on trading securities which are bought and held principally for the purpose of selling them in the near term. No definition available.
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- References No definition available.
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest income, amortization of premium and accretion of discount, on investment in debt security measured at fair value with change in fair value recognized in net income (trading); classified as operating. No definition available.
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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