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Investments - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
SERP investments at fair value		$ 2,290	$ 1,889
CoBank
Schedule of Equity Method Investments [Line Items]
SERP investments at fair value		10,100	10,000
Other nonoperating income (expense)		$ 500	$ 100	$ 2,000
Percentage of patronage credit paid in cash		88.00%
Percentage of patronage credit paid in share		12.00%
Valley Network Partnership
Schedule of Equity Method Investments [Line Items]
Ownership interest, percentage			20.00%
Distribution of capital	$ 100

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