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Share Repurchase Program (Details) - USD ($)
$ in Thousands, shares in Millions
6 Months Ended 23 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Share Repurchase Program [Abstract]      
Stock Repurchase Program, Authorized Amount $ 50,000   $ 50,000
Repurchase of common shares, shares 0.1   1.4
Repurchase of common shares $ 1,912 $ 5,150 $ 32,800
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 17,200   $ 17,200