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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Schedule of Costs of Retirement Plans
Net periodic pension benefit expense recorded in the Company's consolidated statement of operations for defined benefit pension plans include the following components (dollars in thousands):
 Pension Benefit
 202020192018
Service cost$1,230 $1,050 $1,120 
Interest cost930 1,070 1,100 
Expected return on plan assets(1,450)(1,400)(1,520)
Settlements and curtailments— — 2,620 
Amortization of net loss890 580 860 
Net periodic benefit expense$1,600 $1,300 $4,180 
Schedule of Assumptions Used Weighted average assumptions used in accounting for the U.S. defined benefit pension plans are as follows:
 Pension Benefit
 202020192018
Discount rate for obligations2.79 %3.41 %4.50 %
Discount rate for benefit costs3.41 %4.50 %4.37 %
Rate of increase in compensation levelsN/AN/AN/A
Expected long-term rate of return on plan assets6.13 %7.13 %7.13 %
The Company utilizes a high-quality (Aa or greater) corporate bond yield curve as the basis for its domestic discount rate for its pension benefit plans. Management believes this yield curve removes the impact of including additional required corporate bond yields (potentially considered in the above-median curve) resulting from the uncertain economic climate that does not necessarily reflect the general trend in high-quality interest rates.
Weighted average assumptions used in accounting for the non-U.S. defined benefit pension plans are as follows:
 Pension Benefit
 202020192018
Discount rate for obligations1.50 %2.10 %3.00 %
Discount rate for benefit costs2.10 %3.00 %2.60 %
Rate of increase in compensation levels2.80 %3.00 %3.30 %
Expected long-term rate of return on plan assets4.10 %4.60 %4.60 %
Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets
The following provides a reconciliation of the changes in the Company's defined benefit pension plans' projected benefit obligations and fair value of assets for each of the years ended December 31, 2020 and 2019 and the funded status as of December 31, 2020 and 2019 (dollars in thousands):
Pension Benefit
20202019
Changes in Projected Benefit Obligations 
Benefit obligations at January 1$(36,580)$(30,300)
Service cost(1,230)(1,050)
Interest cost(930)(1,070)
Participant contributions(60)(60)
Actuarial loss (a)
(2,420)(4,190)
Benefit payments1,140 900 
Change in foreign currency(750)(810)
Projected benefit obligations at December 31$(40,830)$(36,580)
Changes in Plan Assets
Fair value of plan assets at January 1$30,260 $24,650 
Actual return on plan assets4,780 3,630 
Employer contributions1,140 1,930 
Participant contributions60 60 
Benefit payments(1,140)(900)
Change in foreign currency960 890 
Fair value of plan assets at December 31$36,060 $30,260 
Funded status at December 31$(4,770)$(6,320)
__________________________
(a) The actuarial losses for the year ended December 31, 2020 and 2019 were primarily due to a decrease in the discount rate utilized in measuring the projected benefit obligations, partially offset by other assumptions and experience gains.
Schedule of Amounts Recognized in Balance Sheet
Pension Benefit
20202019
Amounts Recognized in Balance Sheet
Other assets$4,470 $1,690 
Current liabilities(340)(330)
Noncurrent liabilities(8,900)(7,680)
Net liability recognized at December 31$(4,770)$(6,320)
Schedule of Accumulated Other Comprehensive Income
Pension Benefit
20202019
Amounts Recognized in Accumulated Other Comprehensive Loss
Unrecognized prior service cost$170 $190 
Unrecognized net loss11,470 13,240 
Total accumulated other comprehensive loss recognized at December 31$11,640 $13,430 
Changes in AOCI by component for the year ended December 31, 2020 are summarized as follows, net of tax (dollars in thousands):
Defined Benefit Plans Derivative InstrumentsForeign Currency TranslationTotal
Balance, December 31, 2019$(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 of $2.5 million. See Note 14, "Derivative Instruments," for further details.
(b) Defined benefit plans, net of income tax of $0.2 million. See Note 18, "Employee Benefit Plans," for additional details.
Changes in AOCI by component for the year ended December 31, 2019 are summarized as follows, net of tax (dollars in thousands):
Defined Benefit Plans Derivative InstrumentsForeign Currency TranslationTotal
Balance, December 31, 2018$(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 $0.1 million. See Note 18, "Employee Benefit Plans," for additional details.
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets
 Accumulated Benefit ObligationsProjected Benefit Obligations
 2020201920202019
Benefit Obligations at December 31,
Total benefit obligations$(38,410)$(34,460)$(40,830)$(36,580)
Plans with benefit obligations exceeding plan assets    
Benefit obligations$(16,820)$(14,840)$(16,940)$(14,910)
Plan assets$7,700 $6,890 $7,700 $6,890 
Schedule of Effect of Change in Discount Rate and Expected Return on Assets on Benefit Obligations and Expense A 25 basis point change in benefit obligation discount rates or 50 basis point change in expected return on plan assets would have the following effect (dollars in thousands):
 Pension Benefit
 December 31, 2020
Benefit Obligation		2020 Expense
Discount rate  
25 basis point increase$(1,580)$(110)
25 basis point decrease$1,760 $110 
Expected return on assets
50 basis point increaseN/A$(170)
50 basis point decreaseN/A$170 
Schedule of Allocation of Plan Assets
The actual weighted average asset allocation of the Company's domestic and foreign pension plans' assets at December 31, 2020 and 2019 and target allocations by class, were as follows:
 Domestic PensionForeign Pension
 ActualActual
 Target20202019Target20202019
Equity securities60 %67 %62 %33 %33 %30 %
Fixed income36 %32 %34 %45 %44 %46 %
Diversified growth(a)
— %— %— %22 %22 %23 %
Cash and other4 %1 %4 %— 1 %1 %
Total100 %100 %100 %100 %100 %100 %
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
The following table summarizes the level under the fair value hierarchy (see Note 3, "Summary of Significant Accounting Policies") that the Company's pension plan assets are measured, on a recurring basis as of December 31, 2020 (dollars in thousands):
 TotalLevel 1Level 2Level 3
Plan assets subject to leveling    
Investment funds
Equity securities$5,160 $5,160 $— $— 
Fixed income 2,500 2,500 — — 
Cash and cash equivalents310 310 — — 
Plan assets measured at net asset value(a)
Investment funds
Equity securities9,180 
Fixed income12,880 
Diversified growth5,870 
Cash and cash equivalents160 
Total$36,060 $7,970 $— $— 
________________________________________
(a) Certain investments that are measured at fair value using the net asset value per share as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amount presented in the fair value of plan assets.
Schedule of Expected Benefit Payments
The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid during the following years (dollars in thousands):
 Pension
Benefit
2021$1,160 
20221,210 
20231,240 
20241,310 
20251,350 
Years 2026-20307,710