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Stock Compensation - Restricted Stock and Performance Share Grants - Performance Share Grants (Details) - Performance share grants
6 Months Ended
Jun. 30, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Below threshold performance (in shares) 0
Threshold performance (in shares) 67,713
Target performance (in shares) 621,515
Maximum performance (in shares) 1,063,367