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DERIVATIVE FINANCIAL INSTRUMENTS (Details)	12 Months Ended
	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Loan value, percentage	85.00%
Annual interest (as a percent)	1.271%
Average fixed rate	0.521%
Cash Flow Hedge | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Basis points at current leverage ratios	75

X

- Definition

Basis points at current leverage ratios.

+ References

No definition available.

+ Details

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X

- Definition

Portion of derivative amount representing percentage of term loan.

+ References

No definition available.

+ Details

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Namespace Prefix:	aeis_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- 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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- Details

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X

- Details

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