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INTEREST AND OTHER INCOME (LOSS), NET
 3 Months Ended
Jan. 31, 2016
Other Income and Expenses [Abstract]  
INTEREST AND OTHER INCOME (LOSS), NET
INTEREST AND OTHER INCOME (LOSS), NET
The components of interest and other income (loss), net, are as follows (in thousands):
 
Quarter Ended January 31,
 
2016
 
2015
Interest income
$
686

 
$
218

Loss on non-hedge designated foreign currency forward contracts
(4,614
)
 
(4,350
)
Foreign currency exchange loss
(4,377
)
 
(3,652
)
Other
(471
)
 
(449
)
Interest and other income (loss), net
$
(8,776
)
 
$
(8,233
)

Ciena Corporation, as the U.S. parent entity, uses the U.S. dollar as its functional currency; however, some of its foreign branch offices and subsidiaries use the local currency as their functional currency. During the first three months of fiscal 2015 and fiscal 2016, Ciena recorded $3.7 million and $4.4 million in foreign currency exchange losses, respectively, as a result of monetary assets and liabilities that were transacted in a currency other than the entity's functional currency, and the re-measurement adjustments were recorded in interest and other income (loss), net on the Condensed Consolidated Statement of Operations. From time to time, Ciena uses foreign currency forwards to hedge these balance sheet exposures. These forwards are not designated as hedges for accounting purposes and any net gain or loss associated with these derivatives is reported in interest and other income (loss), net on the Condensed Consolidated Statement of Operations. During the first three months of fiscal 2015 and fiscal 2016, Ciena recorded losses of $4.4 million and $4.6 million, respectively, from non-hedge designated foreign currency forward contracts.