Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Schedule of Available-for-sale Investments Measured at Fair Value on a Recurring Basis

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, 2022
Pension surplus investment	Level 1		Level 2		Level 3		Total
	$	—	$	—	$	—	$	—

	Available-for-Sale Investment at Fair Value as of December 31, 2021
	Level 1		Level 2		Level 3		Total(1)
Pension surplus investment(1)	$	6,638	$	—	$	—	$	6,638

(1) This balance was invested in a money market fund and was recorded in the “Other long-term assets” line item in the condensed consolidated statements of financial position. As of December 31, 2021, the fair value of this investment approximated its carrying value.

Schedule of Derivative Instruments Measured at Fair Value on a Recurring Basis

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, 2022
(Dollars in thousands)	Level 1		Level 2		Level 3		Total(1)
Foreign currency contracts	$	—	$	(82)	$	—	$	(82)
Copper derivative contracts	$	—	$	500	$	—	$	500

	Derivative Instruments at Fair Value as of December 31, 2021
(Dollars in thousands)	Level 1		Level 2		Level 3		Total(1)
Foreign currency contracts	$	—	$	(16)	$	—	$	(16)
Copper derivative contracts	$	—	$	1,344	$	—	$	1,344

(1) All balances were recorded in the “Other current assets” or “Other accrued liabilities” line items in the consolidated statements of financial position.