Fair Value Measurements (Tables)

9 Months Ended

Jul. 31, 2013

Fair Value Disclosures [Abstract]

Summary of the fair value of assets recorded on a recurring basis

As of the date indicated, the following table summarizes the fair value of assets and liabilities that are recorded at fair value on a recurring basis (in thousands):

	July 31, 2013
	Level 1		Level 2		Level 3		Total
Assets:
U.S. government obligations	$	115,003	$	—	$	—	$	115,003
Foreign currency forward contracts	—		261		—		261
Embedded redemption feature	—		—		2,510		2,510
Total assets measured at fair value	$	115,003	$	261	$	2,510	$	117,774
Liabilities:
Foreign currency forward contracts	$	—	$	575	$	—	$	575
Total liabilities measured at fair value	$	—	$	575	$	—	$	575

Assets are presented on Ciena's Condensed Consolidated Balance Sheet

As of the date indicated, the assets and liabilities above were presented on Ciena’s Condensed Consolidated Balance Sheet as follows (in thousands):

	July 31, 2013
	Level 1		Level 2		Level 3		Total
Assets:
Short-term investments	$	99,981	$	—	$	—	$	99,981
Prepaid expenses and other	—		261		—		261
Long-term investments	15,022		—		—		15,022
Other long-term assets	—		—		2,510		2,510
Total assets measured at fair value	$	115,003	$	261	$	2,510	$	117,774
Liabilities:
Accrued liabilities	$	—	$	575	$	—	$	575
Total liabilities measured at fair value	$	—	$	575	$	—	$	575

Reconciliation of changes in Level 3 fair value measurements

As of the dates indicated, the following table sets forth, in thousands, the reconciliation of changes in fair value measurements of Level 3 assets:

	Level 3
Balance at October 31, 2012	$	420
Issuances	—
Settlements	(630		)
Changes in unrealized gain (loss)	2,720
Transfers into Level 3	—
Transfers out of Level 3	—
Balance at July 31, 2013	$	2,510