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Short-Term and Long-Term Debt | 6 Months Ended
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May 01, 2021
Debt Disclosure [Abstract] |
Short-Term and Long-Term Debt | SHORT-TERM AND LONG-TERM DEBT 2025 Term Loan On January 23, 2020, Ciena entered into a Refinancing Amendment to Credit Agreement pursuant to which Ciena refinanced the entire outstanding amount of its then existing senior secured term loan and incurred a new senior secured term loan in an aggregate principal amount of $693.0 million and maturing on September 28, 2025 (the “2025 Term Loan”). The net carrying value of Ciena’s term loan was comprised of the following for the periods indicated (in thousands):
|  | May 1, 2021 |  | October 31, 2020
|  | Principal Balance |  | Unamortized Discount |  | Deferred Debt Issuance Costs |  | Net Carrying Value |  | Net Carrying Value
2025 Term Loan |  | $ | 684,337 |  |  | $ | (1,414) |  |  | $ | (2,638) |  |  | $ | 680,285 |  |  | $ | 683,286 |
Deferred debt issuance costs that were deducted from the carrying amounts of the term loan totaled $2.6 million as of May 1, 2021 and $2.9 million at October 31, 2020. Deferred debt issuance costs are amortized using the straight-line method, which approximates the effect of the effective interest rate, through the maturity of the term loan. The amortization of deferred debt issuance costs for this term loan is included in interest expense, and was $0.3 million during the first six months of each of fiscal 2021 and fiscal 2020. The carrying value of the term loan listed above is also net of any unamortized debt discounts. As of May 1, 2021, the estimated fair value of the 2025 Term Loan was $685.2 million. Ciena’s term loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its term loan using a market approach based on observable inputs, such as current market transactions involving comparable securities.

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