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Property, plant and equipment - Interest and AFUDC Capitalized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Schedule of Capitalization [Line Items]
Total	$ 18,051	$ 12,703
Allowance for borrowed funds
Schedule of Capitalization [Line Items]
AFUDC capitalized on regulated property:	8,305	6,040
Allowance for equity funds
Schedule of Capitalization [Line Items]
AFUDC capitalized on regulated property:	3,372	1,901
Interest capitalized on non-regulated property
Schedule of Capitalization [Line Items]
Interest capitalized on non-regulated property	$ 6,374	$ 4,762

X

- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
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Amount of interest capitalized, including amount of allowance for funds used during construction.

+ References

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-Name Accounting Standards Codification
-Topic 980
-SubTopic 835
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482064/980-835-45-1

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