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Investments (Realized Gains (Losses)) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Gain (Loss) on Securities [Line Items] |  |  |  |
Proceeds from Sale of Debt Securities, Available-for-sale |  |  | $ 4,244,000 | $ 28,828,000
Debt Securities [Member] |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss, Writeoff |  |  | 0 | 0
Proceeds from Sale of Debt Securities, Available-for-sale | $ 1,379,000 | $ 27,728,000 | 4,244,000 | 28,828,000
Debt Securities, Available-for-sale, Realized Gain | 0 | 101,000 | 5,000 | 101,000
Debt Securities, Available-for-sale, Realized Loss | $ 5,000 | $ 102,000 | $ 17,000 | $ 102,000

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- Definition Amount of writeoff of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 + Details
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