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Spectrum repacking reimbursements and other, net - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Unusual or Infrequent Item, or Both [Line Items]
Reimbursement from spectrum repacking			$ 16,974	$ 7,400	$ 0
Gain on sale of real estate			2,900	6,000
Asset impairment charges			$ 9,100		$ 2,200
Hurricane Harvey
Unusual or Infrequent Item, or Both [Line Items]
Net expense impact from hurricane	$ 900	$ 900		$ 1,100
Gross hurricane related expenses	26,900	15,800
Insurance recovery	$ 26,000	$ 26,000

X

- Definition

(Gain) Loss On Reimbursement Of Property, Plant And Equipment

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of insurance proceeds for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

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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.

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Amount, before deduction of insurance proceeds, of loss recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

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Amount, after deduction of insurance proceeds, of loss recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

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