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Share Repurchase Program (Details) - USD ($)
$ in Thousands, shares in Millions
6 Months Ended 35 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jul. 28, 2021
Share Repurchase Program [Abstract]        
Stock Repurchase Program, Authorized Amount $ 50,000   $ 50,000 $ 100,000
Repurchase of common shares, shares 0.0   1.4  
Repurchase of common shares   $ 1,912 $ 32,800  
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 17,200   $ 17,200