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Note 7 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Gross carrying amount, amortized intangible assets	$ 857,418	$ 375,418
Accumulated amortization, amortized intangible assets	137,184	84,432
Net carrying amount	720,234	290,986
Indefinite-Lived Intangible Assets	2,097,212	987,212
Indefinite-Lived Intangible Assets	2,097,212	987,212
Total intangible assets, net	2,817,446	1,278,198
Franchise Rights [Member]
Indefinite-Lived Intangible Assets	2,089,712	979,712
Indefinite-Lived Intangible Assets	2,089,712	979,712
Trade Names [Member]
Indefinite-Lived Intangible Assets	7,500	7,500
Indefinite-Lived Intangible Assets	$ 7,500	7,500
Customer Relationships [Member]
Useful life (Year)	17 years
Gross carrying amount, amortized intangible assets	$ 841,700	369,700
Accumulated amortization, amortized intangible assets	132,811	81,865
Net carrying amount	$ 708,889	287,835
Customer Relationships [Member] | Minimum [Member]
Useful life (Year)	13 years 6 months
Trademarks and Trade Names [Member]
Useful life (Year)	4 years 2 months 12 days
Gross carrying amount, amortized intangible assets	$ 14,300	4,300
Accumulated amortization, amortized intangible assets	4,302	2,552
Net carrying amount	$ 9,998	1,748
Trademarks and Trade Names [Member] | Minimum [Member]
Useful life (Year)	2 years 8 months 12 days
Wireless Spectrum Licenses [Member]
Useful life (Year)	15 years
Gross carrying amount, amortized intangible assets	$ 1,418	1,418
Accumulated amortization, amortized intangible assets	71	15
Net carrying amount	$ 1,347	$ 1,403
Wireless Spectrum Licenses [Member] | Minimum [Member]
Useful life (Year)	10 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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+ References

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-Topic 350
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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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-Topic 350
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-Section 45
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