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Supplemental Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2019
Supplemental Income Statement Elements [Abstract] |
Restructuring and related costs | Restructuring and Impairment Charges The components of “Restructuring and impairment charges” were as follows:
| Years Ended December 31,
(Dollars in thousands) | 2019 |  | 2018 |  | 2017
Restructuring charges |  |  |  |  |
Global headquarters relocation | $ | — |  |  | $ | 550 |  |  | $ | 2,760 |
Facility consolidation | 948 |  |  | 1,982 |  |  | — |
Total restructuring charges | 948 |  |  | 2,532 |  |  | 2,760 |
Impairment charges |  |  |  |  |
Fixed assets impairment charges | 1,537 |  |  | 1,506 |  |  | — |
Other impairment charges | — |  |  | — |  |  | 807 |
Total impairment charges | 1,537 |  |  | 1,506 |  |  | 807 |
Total restructuring and impairment charges | $ | 2,485 |  |  | $ | 4,038 |  |  | $ | 3,567 |
Restructuring and impairment charges | The following table summarizes the allocation of restructuring and impairment charges to our operating segments:
| Years Ended December 31,
(Dollars in thousands) | 2019 |  | 2018 |  | 2017
Advanced Connectivity Solutions |  |  |  |  |
Allocated restructuring charges | $ | — |  |  | $ | 244 |  |  | $ | 1,305 |
Allocated impairment charges | 1,537 |  |  | 1,506 |  |  | 161 |
Elastomeric Material Solutions |  |  |  |  |
Allocated restructuring charges | 948 |  |  | 2,152 |  |  | 834 |
Allocated impairment charges | — |  |  | — |  |  | 103 |
Power Electronics Solutions |  |  |  |  |
Allocated restructuring charges | — |  |  | 136 |  |  | 621 |
Allocated impairment charges | — |  |  | — |  |  | 543 |
Total restructuring and impairment charges | $ | 2,485 |  |  | $ | 4,038 |  |  | $ | 3,567 |
Schedule of Income Statement Supplemental Disclosures | The components of “Other operating (income) expense, net” were as follows:
| Years Ended December 31,
(Dollars in thousands) | 2019 |  | 2018 |  | 2017
Lease income | $ | (989 | ) |  | $ | (948 | ) |  | $ | — |
Depreciation on leased assets | 1,907 |  |  | 3,512 |  |  | — |
Loss (gain) on sale or disposal of property, plant and equipment | 756 |  |  | (164 | ) |  | (5,329 | )
Gain from antitrust litigation settlement | — |  |  | (4,231 | ) |  | — |
Indemnity claim settlements from acquisitions | (715 | ) |  | (700 | ) |  | — |
Economic incentive grants | — |  |  | (556 | ) |  | — |
Total other operating (income) expense, net | $ | 959 |  |  | $ | (3,087 | ) |  | $ | (5,329 | )
Interest Income and Interest Expense Disclosure | The components of “Interest expense, net” were as follows:
| Years Ended December 31,
(Dollars in thousands) | 2019 |  | 2018 |  | 2017
Interest on revolving credit facility | $ | 7,378 |  |  | $ | 6,304 |  |  | $ | 5,115 |
Interest rate swap settlements | (200 | ) |  | (247 | ) |  | 51 |
Line of credit fees | 576 |  |  | 573 |  |  | 555 |
Debt issuance amortization costs | 552 |  |  | 552 |  |  | 549 |
Interest on finance leases | 127 |  |  | 172 |  |  | 169 |
Interest income | (1,610 | ) |  | (804 | ) |  | (379 | )
Other | 46 |  |  | 79 |  |  | 71 |
Total interest expense, net | $ | 6,869 |  |  | $ | 6,629 |  |  | $ | 6,131 |

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