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Income Taxes (Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible) (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 $ 4,252 $ 4,813 $ 2,856
Additions as a result of tax positions taken during the current year 294 87 1,106
Additions as a result of tax positions taken during prior years 434 572 1,744
Reductions as a result of tax positions taken during prior years (186) (694) (238)
Reductions relating to settlements with taxing authorities (267) (130) (18)
Reductions as a result of lapse of statute of limitation periods (278) (396) (637)
Ending balance $ 4,249 $ 4,252 $ 4,813