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Restructuring Costs
 12 Months Ended
Dec. 31, 2016
Restructuring and Related Activities [Abstract]  
Restructuring Costs
Restructuring Costs
During the years ended December 31, 2016, 2015 and 2014, the Company recorded net pre-tax restructuring expenses totaling $1.4 million, $1.4 million and $17.0 million, respectively. In 2013, the Company initiated a realignment plan that included closing six not-to-scale sites in the United States and Europe and a transfer of those operations to the Company's larger facilities. The Company also consolidated its optics and laser manufacturing businesses to better realize the benefits of vertical integration in these areas.
The Company recorded the restructuring expenses in the segments as follows (in thousands):
 
Year Ended December 31,
 
2016
 
2015
 
2014
Surveillance
$
107

 
$
226

 
$
5,232

Instruments
492

 
1,170

 
10,998

Security
—

 
—

 
—

OEM & Emerging
65

 
(22
)
 
170

Maritime
—

 
—

 
(90
)
Detection
—

 
(13
)
 
544

Other
—

 
—

 
120

 
$
664

 
$
1,361

 
$
16,974

During the year ended December 31, 2016, the Company also incurred other immaterial restructuring charges representing severance costs associated with cost reduction initiatives executed in the second half of the year that were not related to the realignment plan initiated in 2013.

Note 20.
Restructuring Costs - (Continued)
Restructuring expenses were recorded in the Consolidated Statements of Income as follows (in thousands):
 
Year Ended December 31,
 
2016
 
2015
 
2014
Cost of goods sold
$
—

 
$
—

 
$
591

Restructuring expenses
664

 
1,361

 
16,383

 
$
664

 
$
1,361

 
$
16,974


The following table summarizes the activity by cost type (in thousands):
 
 Severance
 
 Inventory
write downs
 
Facilities Exit, Lease Terminations & Other
 
Total
Balance, December 31, 2013
$
18,191

 
$
—

 
$
3,670

 
$
21,861

2014 restructuring costs
11,860

 
590

 
4,524

 
16,974

Utilization
(19,110
)
 
(590
)
 
(6,709
)
 
(26,409
)
Balance, December 31, 2014
$
10,941

 
$
—

 
$
1,485

 
$
12,426

2015 restructuring expenses
924

 
—

 
437

 
1,361

Utilization
(8,409
)
 
—

 
(1,601
)
 
(10,010
)
Balance, December 31, 2015
$
3,456

 
$
—

 
$
321

 
$
3,777

2016 restructuring expenses
642

 
—

 
22

 
664

Utilization
(2,257
)
 
—

 
(343
)
 
(2,600
)
Balance, December 31, 2016
$
1,841

 
$
—

 
$
—

 
$
1,841