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Income Taxes Impact of New Tax Legislation (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2021
AMT Receivable Resulting from TCJA     $ 37,019
Change in Impact of AMT Repeal on Current Taxes $ 1,902    
Impact of AMT Repeal on Current Taxes   $ 29,581  
AMT Related to Filing of 2017 Tax Return   $ 5,536