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Short-Term and Long-Term Debt (Tables)
9 Months Ended
Aug. 01, 2020
Debt Disclosure [Abstract]  
Schedule of Carrying Values and Estimated Fair Values of Convertible Notes The net carrying values of Ciena’s term loans were comprised of the following for the fiscal periods indicated (in thousands):
August 1, 2020November 2, 2019
Principal BalanceUnamortized DiscountDeferred Debt Issuance CostsNet Carrying ValueNet Carrying Value
New 2025 Term Loan$689,535 $(1,659)$(3,090)$684,786 $ 
Old 2025 Term Loan$ $ $ $ $687,406