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Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2020
Other Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income |
|  | Pension Benefit |  |
|  | 2020 |  | 2019 |  |  |  |
Amounts Recognized in Accumulated Other Comprehensive Loss |  |  |  |  |  |  |  |
Unrecognized prior service cost |  | $ | 170 |  |  | $ | 190 |  |  |  |  |
Unrecognized net loss |  | 11,470 |  |  | 13,240 |  |  |  |  |
Total accumulated other comprehensive loss recognized at December 31 |  | $ | 11,640 |  |  | $ | 13,430 |  |  |  |  |
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 Instruments |  | Foreign Currency Translation |  | Total
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 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. Changes in AOCI by component for the year ended December 31, 2019 are summarized as follows, net of tax (dollars in thousands):
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
Balance, December 31, 2018 |  | $ | (7,200) |  |  | $ | 940 |  |  | $ | (10,590) |  |  | $ | (16,850) |
Net unrealized gains (losses) arising during the period (a) |  | (1,870) |  |  | 3,300 |  |  | (2,060) |  |  | (630) |
Less: Net realized losses reclassified to net income (b) |  | (400) |  |  | — |  |  | (12,350) |  |  | (12,750) |
Net current-period other comprehensive income (loss) |  | (1,470) |  |  | 3,300 |  |  | 10,290 |  |  | 12,120 |
Reclassification of stranded tax effects |  | (1,260) |  |  | (10) |  |  | — |  |  | (1,270) |
Balance, December 31, 2019 |  | $ | (9,930) |  |  | $ | 4,230 |  |  | $ | (300) |  |  | $ | (6,000) |
__________________________ (a) Defined benefit plans, net of income tax of $0.5 million. See Note 18, "Employee Benefit Plans," for additional details. Derivative instruments, net of income tax expense of $1.0 million. See Note 14, "Derivative Instruments," for further details. (b) Defined benefit plans, net of income tax of $0.1 million. See Note 18, "Employee Benefit Plans," for additional details.

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