[Line Items] for Contingencies [Table]

No definition available.

Name:	ueic_ContingenciesLineItems
Namespace Prefix:	ueic_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Disposal Group, Consideration, Received Upon Government Approvals

+ References

No definition available.

+ Details

Name:	ueic_DisposalGroupConsiderationReceivedUponGovernmentApprovals
Namespace Prefix:	ueic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Disposal Group, Including Discontinued Operation, Consideration, Escrow Deposit As Percentage Of Purchase Price

+ References

No definition available.

+ Details

Name:	ueic_DisposalGroupIncludingDiscontinuedOperationConsiderationEscrowDepositAsPercentageOfPurchasePrice
Namespace Prefix:	ueic_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Disposal Group, Including Discontinued Operation, Escrow Deposit

+ References

No definition available.

+ Details

Name:	ueic_DisposalGroupIncludingDiscontinuedOperationEscrowDeposit
Namespace Prefix:	ueic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Number of Customers Named in Lawsuit

+ References

No definition available.

+ Details

Name:	ueic_LossContingencyNumberofCustomersNamedinLawsuit
Namespace Prefix:	ueic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss Contingency, Number of Subsidiaries Named in Lawsuit

+ References

No definition available.

+ Details

Name:	ueic_LossContingencyNumberofSubsidiariesNamedinLawsuit
Namespace Prefix:	ueic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss Contingency, Patents Allegedly Infringed, Number of Products

+ References

No definition available.

+ Details

Name:	ueic_LossContingencyPatentsAllegedlyInfringedNumberofProducts
Namespace Prefix:	ueic_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

+ Details

Name:	us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of another entity's patents that the entity has allegedly infringed.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyPatentsAllegedlyInfringedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_LitigationCaseAxis=ueic_PatentLawsuitAgainstUEBVandTelenetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=ueic_DesignPatentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=ueic_UtilityPatentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=ueic_PatentLawsuitAgainstRokuMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=ueic_GuangzhouFactoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies - Narrative (Details) $ in Thousands, ¥ in Millions							1 Months Ended	3 Months Ended		6 Months Ended
	Sep. 05, 2018 patent	Jun. 26, 2018 USD ($)	Jun. 26, 2018 CNY (¥)	Apr. 26, 2018 USD ($)	Apr. 26, 2018 CNY (¥)	Jun. 10, 2015 product subsidiary patent customer	Sep. 30, 2015 patent	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Apr. 26, 2018 CNY (¥)	Apr. 23, 2018 USD ($)	Apr. 23, 2018 CNY (¥)	Sep. 26, 2016 CNY (¥)
Contingencies [Line Items]
Gain on sale of Guangzhou factory \| $								$ 0	$ 36,978	$ 0	$ 36,978
UEBV Lawsuit \| Pending Litigation
Contingencies [Line Items]
Number of subsidiaries named in lawsuit \| subsidiary						1
Number of customers named in lawsuit \| customer						1
UEBV Lawsuit \| Pending Litigation \| Design Patents
Contingencies [Line Items]
Number of products named in lawsuit \| product						1
Number of patents allegedly infringed upon						2
UEBV Lawsuit \| Pending Litigation \| Utility Patents
Contingencies [Line Items]
Number of patents allegedly infringed upon						1	1
Roku Lawsuit \| Pending Litigation \| Utility Patents
Contingencies [Line Items]
Number of patents allegedly infringed upon	9
Guangzhou Factory \| Disposed of by Sale
Contingencies [Line Items]
Consideration received in sale				$ 5,100								¥ 34.0	$ 51,400	¥ 339.0	¥ 320.0
Consideration receivable upon government approvals				35,800	¥ 237.0
Escrow deposit				$ 10,300	¥ 68.0
Gain on sale of Guangzhou factory		$ 32,100	¥ 37.0
Escrow deposit as percentage of purchase price															10.00%