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Restructuring and Impairment Charges (Tables)
 12 Months Ended
Dec. 31, 2017
Restructuring and Related Activities [Abstract]  
Restructuring and related costs
The following table summarizes changes in the severance accrual from December 31, 2016 through December 31, 2017:
(Dollars in thousands)
Severance related to headquarters relocation
Balance at December 31, 2016
$
470

Provisions
397

Payments
(684
)
Balance at December 31, 2017
$
183
Restructuring and impairment charges
The following table summarizes the restructuring and impairment charges recorded in our operating results in 2017 and 2016:
(Dollars in thousands)
2017
 
2016
Advanced Connectivity Solutions
 
 
 
Severance and other related costs
1,305

 
375

Allocated asset impairment charges
161

 
—

Elastomeric Material Solutions
 
 
 
Severance and other related costs
834

 
176

Allocated asset impairment charges
103

 
—

Power Electronics Solutions
 
 
 
Severance and other related costs
621

 
183

Allocated asset impairment charges
543

 
—

Total Charges for Restructuring and Impairment
$
3,567

 
$
734