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Income Taxes (Summary of Income Tax Contingencies) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Taxes [Abstract] |  |  |
Balance as of January 1 | $ 3,449 | $ 3,449 | $ 3,481
Tax positions related to the current year: |  |  |
Additions |  |  |
Tax positions related to prior years: |  |  |
Reductions | 0 | 0 | (32)
Expiration of statutes of limitation | (558) | 0 | 0
Balance as of December 31 | $ 2,891 | $ 3,449 | $ 3,449

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