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Intangible Assets - Schedule of Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Indefinite-lived Intangible Assets [Roll Forward]
Balance	$ 122,117
Acquisitions	17,800	$ 15,600
Balance	151,169	122,117
Wireless Licenses
Indefinite-lived Intangible Assets [Roll Forward]
Balance	122,117	111,526
Acquisitions	17,843	15,640
Exchanges - licenses received	15,341	196
Exchanges - licenses surrendered	(4,132)	(262)
Cancellations		(4,983)
Balance	$ 151,169	$ 122,117

X

- Definition

Indefinitelived Intangible Assets, Exchanged Licenses Received

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Indefinitelived Intangible Assets, Exchanged Licenses Surrendered

+ References

No definition available.

+ Details

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X

- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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X

- Definition

Amount of divestiture of an asset lacking physical substance and having a projected indefinite period of benefit to fair value. Excludes financial assets and goodwill.

+ References

No definition available.

+ Details

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X

- Definition

Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

+ References

No definition available.

+ Details

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