XML 43 R30.htm IDEA: XBRL DOCUMENT
v3.20.4

Fair Value Measurements (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Fair Value Disclosures [Abstract] |
Schedule of available-for-sale investments measured at fair value on a recurring basis, categorized by level of inputs used in the valuation | Available-for-sale investments measured at fair value on a recurring basis, categorized by the level of inputs used in the valuation, were as follows:
| Available-for-Sale Investment at Fair Value as of December 31, 2020
(Dollars in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Total
Pension surplus investment(1) | $ | 6,706 |  |  | $ | 2,400 |  |  | $ | — |  |  | $ | 9,106 |
(1) This balance was invested in funds comprised of short-term cash and fixed income securities, and was recorded in the “Other long-term assets” line item in the condensed consolidated statements of financial position. As of December 31, 2020, the fair value of this investment approximated its carrying value.
Schedule of derivative instruments measured at fair value on a recurring basis, categorized by the level of inputs used in the valuation | Derivative instruments measured at fair value on a recurring basis, categorized by the level of inputs used in the valuation, include:
| Derivative Instruments at Fair Value as of December 31, 2020
(Dollars in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Total(1)
Foreign currency contracts | $ | — |  |  | $ | (130) |  |  | $ | — |  |  | $ | (130) |
Copper derivative contracts | $ | — |  |  | $ | 4,785 |  |  | $ | — |  |  | $ | 4,785 |
Interest rate swap contract | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
| Derivative Instruments at Fair Value as of December 31, 2019
(Dollars in thousands) | Level 1 |  | Level 2 |  | Level 3 |  | Total(1)
Foreign currency contracts | $ | — |  |  | $ | (6) |  |  | $ | — |  |  | $ | (6) |
Copper derivative contracts | $ | — |  |  | $ | 1,147 |  |  | $ | — |  |  | $ | 1,147 |
Interest rate swap contract | $ | — |  |  | $ | (1,254) |  |  | $ | — |  |  | $ | (1,254) |
(1) All balances were recorded in the “Other current assets” or “Other accrued liabilities” line items in the consolidated statements of financial position, except the 2019 interest rate swap balance, which was recorded in the “Other long-term liabilities” line item.

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration