XML 62 R42.htm IDEA: XBRL DOCUMENT
v3.24.0.1

EMPLOYEE RETIREMENT PLANS AND POSTRETIREMENT BENEFITS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
EMPLOYEE RETIREMENT PLANS AND POSTRETIREMENT BENEFITS |
Changes in projected benefit obligations and plan assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2023 |  | 2022
Projected benefit obligation, beginning of year | ​ | $ | 56,520 | ​ | $ | 85,776
Service cost | ​ |  | 1,016 | ​ |  | 1,133
Interest cost | ​ |  | 2,909 | ​ |  | 1,819
Actuarial loss (gain) | ​ |  | 4,808 | ​ |  | (23,677)
Benefits paid | ​ |  | (1,452) | ​ |  | (1,502)
Translation adjustment | ​ |  | 1,852 | ​ |  | (7,029)
Projected benefit obligation, end of year | ​ | ​ | 65,653 | ​ | ​ | 56,520
​ | ​ | ​ | ​ | ​ | ​ | ​
Fair value of plan assets, beginning of year | ​ | $ | 12,489 | ​ | $ | 18,521
Expected return | ​ |  | 654 | ​ |  | 535
Contributions | ​ |  | 1,443 | ​ |  | 1,430
Benefits paid | ​ |  | (1,140) | ​ |  | (1,124)
Actuarial gain (loss) | ​ |  | 17 | ​ |  | (5,060)
Translation adjustment | ​ |  | 652 | ​ |  | (1,813)
Fair value of plan assets, end of year | ​ | ​ | 14,115 | ​ | ​ | 12,489
Funded status of plan | ​ | $ | (51,538) | ​ | $ | (44,031)
Schedule of net periodic pension benefit costs | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2023 |  | 2022 |  | 2021
Service cost | ​ | $ | 1,016 | ​ | $ | 1,133 | ​ | $ | 1,282
Interest cost | ​ | ​ | 2,909 | ​ | ​ | 1,819 | ​ | ​ | 1,452
Expected return on plan assets | ​ |  | (654) | ​ |  | (535) | ​ |  | (642)
Amortization of actuarial gains and losses | ​ |  | (404) | ​ |  | 322 | ​ |  | 820
Net periodic pension cost | ​ | $ | 2,867 | ​ | $ | 2,739 | ​ | $ | 2,912
Schedule of assumptions used in determination of net period pension cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31, |
​ |  | 2023 |  | 2022 |  | 2021 |
Discount rate used for net periodic pension costs |  | 5.1 | % | 2.6 | % | 1.6 | %
Discount rate used for pension benefit obligations | ​ | 4.4 | % | 5.1 | % | 2.6 | %
Expected long-term return on plan assets |  | 5.2 | % | 3.2 | % | 3.2 | %
Schedule of fair value qualified pension plan assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Diversified Growth Fund | ​ | $ | — | ​ | $ | 11,606 | ​ | $ | — | ​ | $ | 11,606
Corporate Bonds | ​ |  | — | ​ | ​ | 1,212 | ​ | ​ | — | ​ | ​ | 1,212
Insurance Contracts | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 799 | ​ | ​ | 799
Cash | ​ |  | 498 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 498
Total | ​ | $ | 498 | ​ | $ | 12,818 | ​ | $ | 799 | ​ | $ | 14,115
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2022
​ |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Diversified Growth Fund | ​ | $ | — | ​ | $ | 9,100 | ​ | $ | — | ​ | $ | 9,100
Corporate Bonds | ​ |  | — | ​ |  | 2,333 | ​ |  | — | ​ |  | 2,333
Insurance Contracts | ​ | ​ | — | ​ |  | — | ​ |  | 798 | ​ |  | 798
Cash | ​ |  | 258 | ​ |  | — | ​ |  | — | ​ |  | 258
Total | ​ | $ | 258 | ​ | $ | 11,433 | ​ | $ | 798 | ​ | $ | 12,489
Schedule of expected future benefit payments under defined benefit pension plans | ​
​ | ​ | ​ | ​
Year Ending December 31, |  | ​ | ​
2024 | ​ | $ | 3,884
2025 | ​ | ​ | 2,205
2026 | ​ | ​ | 4,224
2027 | ​ | ​ | 2,927
2028 | ​ | ​ | 3,217
2029 to 2033 | ​ | ​ | 21,309
​

X
- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans including the fair value of each major category of plan assets and the level within the fair value hierarchy in which the fair value measurements fall. + References No definition available. + Details
Name: | aeis_ScheduleOfAllocationOfPlanAssetsFairValueHierarchyTableTextBlock
Namespace Prefix: | aeis_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in the benefit obligation, fair value of plan assets, and funded status of pension plans or other employee benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (a)(b)(c) -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assumption used to determine benefit obligation and net periodic benefit cost of defined benefit plan. Includes, but is not limited to, discount rate, rate of compensation increase, expected long-term rate of return on plan assets and interest crediting rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfAssumptionsUsedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration