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Investments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
SERP investments at fair value	$ 2,467		$ 2,290
CoBank
Schedule of Equity Method Investments [Line Items]
SERP investments at fair value	10,100		$ 10,100
Other nonoperating income (expense)	$ 300	$ 100
Percentage of patronage credit paid in cash	88.00%
Percentage of patronage credit paid in share	12.00%

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