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Goodwill - Changes in Carrying Amount of Goodwill (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Goodwill [Roll Forward]    
Balance, beginning of period $ 151,238 $ 151,238
Goodwill acquired during the period 0 0
Balance, end of period $ 151,238 $ 151,238