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Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Other Comprehensive Income [Abstract] |  |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Changes in AOCI by component for the six months ended June 30, 2025 are summarized as follows, net of tax (dollars in thousands):
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
Balance, December 31, 2024 |  | $ | (8,010) |  |  | $ | 16,300 |  |  | $ | (26,840) |  |  | $ | (18,550) |
Net unrealized gains (losses) arising during the period (a) |  | — |  |  | (12,730) |  |  | 33,880 |  |  | 21,150 |
Less: Net realized losses reclassified to net income |  | (20) |  |  | — |  |  | — |  |  | (20) |
Net current-period other comprehensive income (loss) |  | 20 |  |  | (12,730) |  |  | 33,880 |  |  | 21,170 |
Balance, June 30, 2025 |  | $ | (7,990) |  |  | $ | 3,570 |  |  | $ | 7,040 |  |  | $ | 2,620 |
__________________________ (a) Derivative instruments, net of income tax of $4.1 million. See Note 10, "Derivative Instruments," for further details. | Changes in AOCI by component for the six months ended June 30, 2024 are summarized as follows, net of tax (dollars in thousands):
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
Balance, December 31, 2023 |  | $ | (5,730) |  |  | $ | 13,260 |  |  | $ | (6,880) |  |  | $ | 650 |
Net unrealized gains (losses) arising during the period (a) |  | — |  |  | 1,110 |  |  | (8,950) |  |  | (7,840) |
Less: Net realized losses reclassified to net income |  | (50) |  |  | — |  |  | — |  |  | (50) |
Net current-period other comprehensive income (loss) |  | 50 |  |  | 1,110 |  |  | (8,950) |  |  | (7,790) |
Balance, June 30, 2024 |  | $ | (5,680) |  |  | $ | 14,370 |  |  | $ | (15,830) |  |  | $ | (7,140) |
__________________________ (a) Derivative instruments, net of income tax of $0.4 million. See Note 10, "Derivative Instruments," for further details.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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