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v3.21.2

Investments - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
SERP investments | $ 862 |  | $ 862 |  | $ 0
SERP Investments at fair value | 2,165 |  | 2,165 |  | 2,687
CoBank |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
SERP Investments at fair value | 10,100 |  | 10,100 |  | $ 9,800
Other nonoperating income (expense) | $ 500 | $ 1,000 | $ 1,500 | $ 3,000 |
Percentage of patronage credit paid in cash | 75.00% |  | 75.00% |  |
Percentage of patronage credit paid in share | 25.00% |  | 25.00% |  |
Valley Network Partnership |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership interest, percentage | 20.00% |  | 20.00% |  |
Equity Method Investee |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Revenue from related parties | $ 200 |  | $ 500 | 700 |
Related party costs | $ 30 | $ 700 | $ 1,100 | $ 2,200 |

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