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OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND ESTIMATES - Revenue Recognition and Warrant Costs (Details)	12 Months Ended
	Dec. 31, 2021 country
Worldwide support organization maintained in number of countries	10
Precision Power Products [Member] | Minimum [Member]
Warranty period	12 months
Precision Power Products [Member] | Maximum [Member]
Warranty period	24 months
Inverter Products [Member] | Minimum [Member]
Warranty period	5 years
Inverter Products [Member] | Maximum [Member]
Warranty period	10 years
Buildings [Member] | Inverter Products [Member] | Maximum [Member]
Additional warranty period	20 years

X

- Definition

Additional warranty period of product, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	aeis_AdditionalProductWarrantyPeriod
Namespace Prefix:	aeis_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Warranty period of product, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	aeis_ProductWarrantyPeriod
Namespace Prefix:	aeis_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_ProductOrServiceAxis=aeis_PrecisionPowerProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
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:

X

- Details

Name:	srt_ProductOrServiceAxis=aeis_InverterProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: