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Income Taxes (Changes in Balance of Gross Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance $ 7,471 $ 6,029 $ 4,756
Increase in tax positions for prior years 103 158 261
Decreases in tax positions for prior years 0 0 0
Increase in tax positions for current year 1,663 1,284 1,012
Decrease in tax positions for current year 0 0 0
Ending balance $ 9,237 $ 7,471 $ 6,029