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Supplemental Financial Information (Tables)
 12 Months Ended
Dec. 31, 2020
Supplemental Income Statement Elements [Abstract]  
Restructuring and impairment charges
The components of “Restructuring and impairment charges” line item in the condensed consolidated statements of operations, were as follows:
Years Ended December 31,
(Dollars in thousands)202020192018
Restructuring charges
Manufacturing footprint optimization$12,348 $— $— 
Facility consolidation— 948 1,982 
Global headquarters relocation— — 550 
Restructuring charges12,348 948 2,532 
Impairment charges
Fixed assets impairment charges587 1,537 1,506 
Other impairment charges52 — — 
Impairment charges639 1,537 1,506 
Total restructuring and impairment charges$12,987 $2,485 $4,038 
The following table summarizes the allocation of restructuring and impairment charges to our operating segments:
Years Ended December 31,
(Dollars in thousands)202020192018
Advanced Connectivity Solutions
Allocated restructuring charges$4,288 $— $244 
Allocated impairment charges335 1,537 1,506 
Elastomeric Material Solutions
Allocated restructuring charges401 948 2,152 
Allocated impairment charges52 — — 
Power Electronics Solutions
Allocated restructuring charges7,659 — 136 
Allocated impairment charges252 — — 
Total restructuring and impairment charges$12,987 $2,485 $4,038 
Severance and related benefits activity Severance and related benefits activity related to the manufacturing footprint optimization plan is presented in the table below for the year ended December 31, 2020:
(Dollars in thousands)Manufacturing Footprint Optimization Restructuring Severance and Related Benefits
Balance as of December 31, 2019$— 
Provisions11,451 
Payments(819)
Foreign currency translation adjustment371 
Balance as of December 31, 2020
$11,003 
Restructuring Charges - Facility Consolidation & Global Headquarters Relocation
Components of other operating (income) expense, net
The components of “Other operating (income) expense, net” were as follows:
Years Ended December 31,
(Dollars in thousands)202020192018
Lease income$— $(989)$(948)
Depreciation on leased assets— 1,907 3,512 
Loss (gain) on sale or disposal of property, plant and equipment41 756 (164)
Gain from antitrust litigation settlement— — (4,231)
Indemnity claim settlements from acquisitions— (715)(700)
Economic incentive grants(145)— (556)
Total other operating (income) expense, net$(104)$959 $(3,087)
Components of interest expense, net
The components of “Interest expense, net” were as follows:
Years Ended December 31,
(Dollars in thousands)202020192018
Interest on revolving credit facility$3,294 $7,378 $6,304 
Interest rate swap settlements3,191 (200)(247)
Line of credit fees715 576 573 
Debt issuance amortization costs593 552 552 
Interest on finance leases134 127 172 
Interest income(939)(1,610)(804)
Other147 46 79 
Total interest expense, net$7,135 $6,869 $6,629