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Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of Unrecognized Income Tax Benefits      
Balance at January 1, $ 20,994 $ 18,586 $ 15,117
Additions based on income tax positions related to current year 461 550 1,165
Additions for income tax positions of prior years(1) 147 0 2,321
Additions from acquisition 0 3,464 0
Reductions for income tax positions of prior years (327) (1,589) 0
Statute of limitation expirations (820) (17) (17)
Settlements (205) 0 0
Balance at December 31, 20,250 20,994 18,586
Unrecognized tax benefits, income tax penalties and interest accrued 2,700 3,300 227
Unrecognized tax benefits that would impact effective tax rate 19,100 20,400 15,200
Unrecognized tax benefits, income tax penalties and interest accrued that would impact effective tax rate $ (366) $ 1,400 $ 193