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v3.20.4

WARRANTIES - Narrative (Details) | 12 Months Ended
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Dec. 31, 2020
Minimum |
Product Liability Contingency [Line Items] |
Standard Product Warranty Term | 12 months
Maximum |
Product Liability Contingency [Line Items] |
Standard Product Warranty Term | 24 months

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- Definition Standard Product Warranty Term + References No definition available. + Details
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Namespace Prefix: | aeis_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |