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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Other invested assets	$ 2,005	$ 2,924
Federal Deposit Insurance Corporation amount	250
Short-term investment balances in investment that are insured by SIPC	$ 500

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The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

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Amount of short-term investments classified as other.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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