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v3.23.3

Nature of Operations and Basis of Presentation - Narrative (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 45 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2023 USD ($) | Jul. 31, 2023 USD ($) county | Apr. 30, 2023 mi² city people county | Oct. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Feb. 28, 2021 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) county | Sep. 30, 2022 USD ($) county | Dec. 31, 2026 USD ($) | Sep. 21, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Mar. 31, 2022 USD ($) | Sep. 30, 2021 USD ($)
Conversion of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Broadband licenses granted, number of counties | county |  |  |  |  |  |  |  |  | 14 | 45 |  |  |  |  |  |
Payments to acquire intangible assets |  |  |  |  |  |  |  |  | $ 10,077 | $ 11,228 |  |  |  |  |  |
Prepayments received | $ 80,265 |  |  |  | $ 53,945 |  | $ 80,265 | $ 53,945 | 80,265 | 53,945 |  |  | $ 60,759 |  | $ 54,678 |
Spectrum revenues |  |  |  |  |  |  | 1,052 | 398 | 1,660 | 733 |  |  |  |  |  |
Contingent liability |  |  |  |  |  | $ 20,000 |  |  |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  |  |  |  |  |  | $ 250,000 |  |  |  | $ 50,000
SDG&E |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration transferred |  |  |  |  |  | $ 50,000 |  |  |  |  |  |  |  |  |  |
Lower Colorado River Authority (LCRA) | Wireless Licenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Broadband licenses granted, number of counties | county |  |  | 68 |  |  |  |  |  |  |  |  |  |  |  |  |
Broadband licenses granted, number of cities | city |  |  | 30 |  |  |  |  |  |  |  |  |  |  |  |  |
Broadband licenses granted, number of customers | people |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |
Broadband licenses granted, service area | mi² |  |  | 73,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Lower Colorado River Authority (LCRA) | Wireless Licenses | Forecast |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire intangible assets |  |  |  |  |  |  |  |  |  |  | $ 30,000 |  |  |  |  |
Xcel Energy | Spectrum revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Spectrum revenues |  |  |  |  |  |  | 444 | $ 0 | 444 | $ 0 |  |  |  |  |  |
Xcel Energy | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Broadband licenses granted, number of counties | county |  | 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agreement term |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |  |  |
Total scheduled prepayments |  |  |  | $ 80,000 |  |  |  |  |  |  |  |  |  |  |  |
Prepayments received | 29,200 |  |  |  |  |  | $ 29,200 |  | $ 29,200 |  |  |  |  | $ 8,000 |  |
Milestone payment received |  | $ 21,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
SDG&E | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Milestone payment received | 25,200 |  |  |  | $ 200 |  |  |  |  |  |  |  |  |  |  |
Delivery delay adjustments | $ 1,100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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