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Other Comprehensive Income (Notes)
 12 Months Ended
Dec. 31, 2021
Other Comprehensive Income [Abstract]  
Other Comprehensive Income Other Comprehensive Income
Changes in AOCI by component for the year ended December 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 $(5,620)
Net unrealized gains (losses) arising during the period (a)
3,150 9,490 (7,430)5,210 
Less: Net realized losses reclassified to net income (b)
(640)— — (640)
Net current-period other comprehensive income (loss)3,790 9,490 (7,430)5,850 
Balance, December 31, 2021$(4,830)$5,910 $(850)$230 
__________________________
(a) Defined benefit plans, net of income tax of $0.8 million. See Note 18, "Employee Benefit Plans," for additional details. Derivative instruments, net of income tax of $3.1 million. See Note 14, "Derivative Instruments," for further details.
(b) Defined benefit plans, net of income tax of $0.2 million. See Note 18, "Employee Benefit Plans," for additional details.
Changes in AOCI by component for the year ended December 31, 2020 are summarized as follows, net of tax (dollars in thousands):
Defined Benefit Plans Derivative InstrumentsForeign Currency TranslationTotal
Balance, December 31, 2019$(9,930)$4,230 $(300)$(6,000)
Net unrealized gains (losses) arising during the period (a)
670 (7,810)6,880 (260)
Less: Net realized losses reclassified to net income (b)
(640)— — (640)
Net current-period other comprehensive income (loss)1,310 (7,810)6,880 380 
Balance, December 31, 2020$(8,620)$(3,580)$6,580 $(5,620)
__________________________
(a) Defined benefit plans, net of income tax of $0.4 million. See Note 18, "Employee Benefit Plans," for additional details. Derivative instruments, net of income tax expense of $2.5 million. See Note 14, "Derivative Instruments," for further details.
(b) Defined benefit plans, net of income tax of $0.2 million. See Note 18, "Employee Benefit Plans," for additional details.