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Other Comprehensive Income (Loss) Other Comprehensive Income (Loss) (Tables)
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
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, 2022 are summarized as follows, net of tax (dollars in thousands):
Defined Benefit Plans Derivative InstrumentsForeign Currency TranslationTotal
Balance, December 31, 2021$(4,830)$5,910 $(850)$230 
Net unrealized gains (losses) arising during the period (a)
— 11,670 (17,770)(6,100)
Less: Net realized losses reclassified to net income (b)
(330)— — (330)
Net current-period other comprehensive income (loss)330 11,670 (17,770)(5,770)
Balance, June 30, 2022$(4,500)$17,580 $(18,620)$(5,540)
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(a)     Derivative instruments, net of income tax of approximately $3.8 million. See Note 11, "Derivative Instruments," for further details.
(b)     Defined benefit plans, net of income tax of approximately $0.1 million. See Note 18, "Defined Benefit Plans," for further details.
Changes in AOCI by component for the six months ended June 30, 2021 are summarized as follows, net of tax (dollars in thousands):
Defined Benefit Plans Derivative InstrumentsForeign Currency TranslationTotal
Balance, December 31, 2020$(8,620)$(3,580)$6,580 $(5,620)
Net unrealized gains (losses) arising during the period (a)
— 3,330 (2,020)1,310 
Less: Net realized losses reclassified to net income (b)
(310)— — (310)
Net current-period other comprehensive income (loss)310 3,330 (2,020)1,620 
Balance, June 30, 2021$(8,310)$(250)$4,560 $(4,000)
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(a)     Derivative instruments, net of income tax of approximately $1.1 million. See Note 11, "Derivative Instruments," for further details.
(b)     Defined benefit plans, net of income tax of approximately $0.1 million. See Note 18, "Defined Benefit Plans," for further details.