Goodwill (Tables)

12 Months Ended

Oct. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill Allocated by Reportable Segments

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

	Balance at October 31, 2016		Acquisitions		Impairments		Translation		Balance at October 31, 2017
Software and Software-Related Services	$	201,428	$	—	$	—	$	—	$	201,428
Networking Platforms	65,546		—		—		484		66,030
Total	$	266,974	$	—	$	—	$	484	$	267,458