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GOODWILL
3 Months Ended
Jan. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL
GOODWILL

Ciena's goodwill was generated from the acquisition of Cyan, Inc. ("Cyan") and is primarily related to expected synergies. The following table presents the goodwill allocated to Ciena's reportable segments as of the dates indicated (in thousands):

 
 
Balance at October 31, 2015
 
Acquisitions
 
Impairments
 
Balance at January 31, 2016
Software and Software-Related Services
 
$
201,428

 
$

 
$

 
$
201,428

Networking Platforms
 
55,006

 

 

 
55,006

Total
 
$
256,434

 
$

 
$

 
$
256,434