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Utility Plant Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Feb. 25, 2022	Dec. 31, 2021	Jan. 08, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 35,959		$ 36,276
Net intangible assets	16,367		20,650
Concession fees
Finite-Lived Intangible Assets [Line Items]
Intangible assets	6,800	$ 1,600	6,800	$ 5,000
Accumulated amortization of intangible assets	6,693		6,596
Purchase premium customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets	13,400		13,400
Accumulated amortization of intangible assets	2,881		1,988
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Intangible assets	15,759		16,076
Accumulated amortization of intangible assets	$ 10,018		$ 7,042

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- Definition

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

+ References

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