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Other Income (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Other Income [Line Items] |  |  |  |  |  |
Gain on insurance settlement |  |  | $ 0 | $ 119,000 | $ 2,000 |
Des Moines, Iowa market |  |  |  |  |  |
Other Income [Line Items] |  |  |  |  |  |
Cash proceeds from insurance settlement |  | $ 445,000 |  |  |  |
Gain on insurance settlement |  | $ 445,000 |  |  |  |
Other Nonoperating Income (Expense) [Member] |  |  |  |  |  |
Other Income [Line Items] |  |  |  |  |  |
Reimbursements received | $ 115,000 |  |  |  |  | $ 116,000

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