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Common Stock Repurchase Plan (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 26 Months Ended 40 Months Ended
Jun. 21, 2019
Jun. 30, 2019
May 03, 2019
Jun. 30, 2020
May 17, 2019
Mar. 06, 2017
Equity, Class of Treasury Stock [Line Items]            
Authorized repurchase amount           $ 50.0
Shares, repurchased amount 4,504,504     2,500,000    
Additional authorized amount         $ 50.0  
Shares acquired, average price per share $ 11.40     $ 16.23    
Common stock repurchased $ 51.3 $ 51.3 $ 41.0