Lessor, Operating Lease, Renewal Term, Number

No definition available.

Name:	atex_LessorOperatingLeaseRenewalTermNumber
Namespace Prefix:	atex_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 6: http://www.xbrl.org/2003/role/exampleRef
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
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+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of lease payments to be received by lessor for operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-12

+ Details

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

- Definition

Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-3

+ Details

Name:	us-gaap_LessorOperatingLeaseRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-5

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-Publisher FASB
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+ Details

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

- Details

Name:	srt_CounterpartyNameAxis=atex_AmerenCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=atex_EvergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=atex_XcelEnergyServicesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=atex_TampaElectricCompanyMember
Namespace Prefix:
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Balance Type:
Period Type:

Revenue - Spectrum Lease Agreements (Details) $ in Millions	32 Months Ended	45 Months Ended	58 Months Ended	67 Months Ended
Revenue - Spectrum Lease Agreements (Details) $ in Millions	Jun. 30, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2026 USD ($)	Nov. 30, 2023 USD ($) term	Oct. 31, 2022 USD ($) term	Sep. 30, 2021 USD ($) term	Dec. 31, 2020 USD ($)
Ameren
Disaggregation of Revenue [Line Items]
Initial Term	30 years	30 years	30 years	30 years				30 years
Lease extension								10 years
Total Consideration	$ 2.5	$ 2.5	$ 2.5	$ 2.5				$ 47.7
Payments Received				45.2
Payments Remaining	2.5	2.5	2.5	2.5				$ 47.7
Evergy
Disaggregation of Revenue [Line Items]
Initial Term							20 years
Renewal term, number \| term							2
Lease extension							10 years
Total Consideration	0.0	0.0	0.0	0.0			$ 30.2
Payments Received			30.2
Payments Remaining	$ 0.0	$ 0.0	$ 0.0	$ 0.0			$ 30.2
Xcel Energy
Disaggregation of Revenue [Line Items]
Initial Term	20 years	20 years	20 years	20 years		20 years
Renewal term, number \| term						2
Lease extension						10 years
Total Consideration	$ 4.0	$ 4.0	$ 4.0	$ 4.0		$ 80.0
Payments Received		76.0
Payments Remaining	4.0	4.0	4.0	4.0		$ 80.0
TECO
Disaggregation of Revenue [Line Items]
Initial Term					20 years
Renewal term, number \| term					2
Lease extension					10 years
Total Consideration	0.0	0.0	0.0	0.0	$ 34.5
Payments Received	34.5
Payments Remaining	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 34.5