Fair Value Measurements (Tables)

6 Months Ended

Apr. 30, 2014

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):

	April 30, 2014
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	226,925	$	—	$	—	$	226,925
U.S. government obligations	—		75,100		—		75,100
Commercial paper	—		49,989		—		49,989
Foreign currency forward contracts	—		296		—		296
Embedded redemption feature	—		—		190		190
Total assets measured at fair value	$	226,925	$	125,385	$	190	$	352,500
Liabilities:
Foreign currency forward contracts	$	—	$	3,548	$	—	$	3,548
Total liabilities measured at fair value	$	—	$	3,548	$	—	$	3,548

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):

	April 30, 2014
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents	$	226,782	$	19,998	$	—	$	246,780
Short-term investments	—		90,049		—		90,049
Prepaid expenses and other	52		296		190		538
Long-term investments	—		15,042		—		15,042
Other long-term assets	91		—		—		91
Total assets measured at fair value	$	226,925	$	125,385	$	190	$	352,500
Liabilities:
Accrued liabilities	$	—	$	3,548	$	—	$	3,548
Total liabilities measured at fair value	$	—	$	3,548	$	—	$	3,548

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, 2013	$	2,740
Issuances	—
Settlements	—
Changes in unrealized gain (loss)	(2,550		)
Transfers into Level 3	—
Transfers out of Level 3	—
Balance at April 30, 2014	$	190