GOODWILL
 6 Months Ended
Apr. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL
GOODWILL

The following table presents the goodwill allocated to Ciena's applicable reportable segments as of the dates indicated (in thousands):

 
 
Balance at October 31, 2016
 
Acquisitions
 
Impairments
 
Translation
 
Balance at April 30, 2017
Software and Software-Related Services
 
$
201,428

 
$
—

 
$
—

 
$
—

 
$
201,428

Networking Platforms
 
65,546

 
—

 
—

 
(201
)
 
65,345

Total
 
$
266,974

 
$
—

 
$
—

 
$
(201
)
 
$
266,773