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Restructuring Costs (Tables)
 12 Months Ended
Oct. 31, 2017
Restructuring and Related Activities [Abstract]  
Activity and balance of the restructuring liability accounts
The following table sets forth the restructuring activity and balance of the restructuring liability accounts for the fiscal years indicated (in thousands):

 
Workforce
reduction
 
Consolidation
of excess
facilities
 
Total
Balance at October 31, 2014
$
181

 
$
1,134

 
$
1,315

Additional liability recorded
8,631

(1) 
(5
)
 
8,626

Cash payments
(8,221
)
 
(441
)
 
(8,662
)
Balance at October 31, 2015
591

 
688

 
1,279

Additional liability recorded
2,844

(2) 
2,089

 
4,933

Cash payments
(2,567
)
 
(807
)
 
(3,374
)
Balance at October 31, 2016
868

 
1,970

 
2,838

Additional liability recorded
5,883

(3) 
5,432

(4) 
11,315

Adjustment to previous estimates
—

 
(1,048
)
 
(1,048
)
Cash payments
(5,460
)
 
(4,706
)
 
(10,166
)
Balance at October 31, 2017
$
1,291

 
$
1,648

 
$
2,939

Current restructuring liabilities
$
1,291

 
$
1,648

 
$
2,939

Non-current restructuring liabilities
$
—

 
$
—

 
$
—

_________________________________
(1)
During fiscal 2015, Ciena recorded a charge of $8.6 million of severance and other employee-related costs associated with a workforce reduction of approximately 125 employees.
(2)
During fiscal 2016, Ciena recorded a charge of $2.8 million of severance and other employee-related costs associated with a workforce reduction of approximately 75 employees.
(3)
During fiscal 2017, Ciena recorded a charge of $5.9 million of severance and other employee-related costs associated with a workforce reduction of approximately 100 employees.
(4)
Reflects unfavorable lease commitments and relocation costs incurred in connection with our research and development center facility transitions in Ottawa, Canada