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Basis of Presentation and Summary of Significant Accounting Policies Radio Conversion Costs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 30 Months Ended | 48 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Dec. 31, 2022
Subsequent Event [Line Items] |  |  |  |  |  |
Radio Conversion Cost |  |  | $ 119,000 |  | $ 196,000 |
ADT Radio Conversion Revenue | $ 10,000 | $ 9,000 | $ 21,000 | $ 18,000 |  |
Forecast | Minimum |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Radio Conversion Cost |  |  |  |  |  | $ 250,000
Forecast | Maximum |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Radio Conversion Cost |  |  |  |  |  | $ 300,000

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- Definition Radio Conversion Cost, net + References No definition available. + Details
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- Definition Radio Conversion Revenue + References No definition available. + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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