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Other Comprehensive Income (Loss) Other Comprehensive Income (Loss) (Tables)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Other Comprehensive Income [Abstract]    
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Changes in AOCI by component for the three months ended March 31, 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)$230 
Net unrealized gains (losses) arising during the period (a)
— 1,560 (4,040)(2,480)
Less: Net realized losses reclassified to net income (b)
(240)— — (240)
Net current-period other comprehensive income (loss)240 1,560 (4,040)(2,240)
Balance, March 31, 2022$(4,590)$7,470 $(4,890)$(2,010)
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(a)     Derivative instruments, net of income tax of approximately $0.5 million. See Note 11, "Derivative Instruments," for further details.
(b)     Defined benefit plans, net of income tax of approximately $0.1 million. See Note 18, "Defined Benefit Plans," for further details.
Changes in AOCI by component for the three months ended March 31, 2021 are summarized as follows, net of tax (dollars in thousands):
Defined Benefit Plans Derivative InstrumentsForeign Currency TranslationTotal
Balance, December 31, 2020$(8,620)$(3,580)$6,580 $(5,620)
Net unrealized gains (losses) arising during the period (a)
— 3,900 (3,420)480 
Less: Net realized losses reclassified to net income(150)— — (150)
Net current-period other comprehensive income (loss)150 3,900 (3,420)630 
Balance, March 31, 2021$(8,470)$320 $3,160 $(4,990)
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(a)     Derivative instruments, net of income tax of approximately $1.3 million. See Note 11, "Derivative Instruments," for further details.