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Marketable Securities (Summary of Investment Securities in an Unrealized Loss Position) (Details) $ in Thousands | Dec. 31, 2022 USD ($)
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Investments, Debt and Equity Securities [Abstract] |
Unrealized Losses, Less than 12 months | $ (301)
Unrealized Losses, 12 months or more | (1,024)
Unrealized Losses, Total | (1,325)
Fair value, Less than 12 months | 4,595
Fair value, 12 months or more | 13,401
Fair value, Total | $ 17,996

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