SHORT-TERM AND LONG-TERM DEBT (Tables)

6 Months Ended

Apr. 30, 2016

Debt Disclosure [Abstract]

Schedule of carrying values and estimated fair values of convertible notes

The principal balance, unamortized discount and net carrying amount of the 2021 Term Loan were as follows as of April 30, 2016 (in thousands):

	Principal Balance		Unamortized Discount		Net Carrying Amount
Term Loan Payable due April 25, 2021	$	250,000	$	1,247	$	248,753

The following table sets forth the carrying value and the estimated fair value of the 2021 Term Loan (in thousands):

	April 30, 2016
	Carrying Value		Fair Value(2)
Term Loan Payable due April 25, 2021(1)	$	248,753	$	250,938

(1) Includes unamortized bond discount.

(2) The 2021 Term Loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2021 Term Loan using a market approach based upon observable inputs, such as current market transactions involving comparable securities.

The principal balance, unamortized discount and net carrying amount of the 2019 Term Loan were as follows as of April 30, 2016 (in thousands):

	Principal Balance		Unamortized Discount		Net Carrying Amount
Term Loan Payable due July 15, 2019	$	245,625	$	929	$	244,696

The following table sets forth the carrying value and the estimated fair value of the 2019 Term Loan (in thousands):

	April 30, 2016
	Carrying Value		Fair Value(2)
Term Loan Payable due July 15, 2019(1)	$	244,696	$	245,011

(1) Includes unamortized bond discount.

(2) The 2019 Term Loan is categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its 2019 Term Loan using a market approach based upon observable inputs, such as current market transactions involving comparable securities.

The following table sets forth, in thousands, the carrying value and the estimated fair value of Ciena’s outstanding issues of convertible notes:

	April 30, 2016
	Carrying Value		Fair Value(1)
0.875% Convertible Senior Notes due June 15, 2017	$	479,985	$	471,585
3.75% Convertible Senior Notes due October 15, 2018	350,000		395,063
4.0% Convertible Senior Notes due December 15, 2020 (2)	186,954		224,766
	$	1,016,939	$	1,091,414

(1) The convertible notes are categorized as Level 2 in the fair value hierarchy. Ciena estimated the fair value of its outstanding convertible notes using a market approach based upon observable inputs, such as current market transactions involving comparable securities.

(2) Includes unamortized discount and accretion of principal.

Schedule of details of convertible notes

The principal balance, unamortized discount and net carrying amount of the liability and equity components of Ciena's 4.0% Convertible Senior Notes due December 15, 2020 are as follows as of April 30, 2016:

	Liability Component						Equity Component
	Principal Balance		Unamortized Discount		Net Carrying Amount		Net Carrying Amount
4.0% Convertible Senior Notes due December 15, 2020	$	199,400	$	12,446	$	186,954	$	43,131