| 2021-01-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        KELLY THOMAS A           | 
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                                                                                        | 2021-01-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        NOVAES DJALMA JR           | 
                                       | 
                                       | 
                                       | 
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                                                                                        | 2021-01-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Gifford Gerard H           | 
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                                                                                        | 2021-01-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        DONAHUE TIMOTHY J           | 
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                                                                                        | 2020-12-14           | 
                                                                                        3,4,5           | 
                                                                                        3           | 
                                                                                        Initial filing by director officer or owner of more than ten percent.           | 
                                                                                        Wilson Dwayne Andree           | 
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                                       | 
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                                                                                        | 2020-12-11           | 
                                                                                        Current Reports           | 
                                                                                        8-K           | 
                                                                                        Report of unscheduled material events or corporate event           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-11-06           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Gifford Gerard H           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-11-02           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Beaver David A.           | 
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                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Funk Andrea J.           | 
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                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        OWENS B CRAIG           | 
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                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        MILLER JAMES H           | 
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                                       | 
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                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        CONWAY JOHN W           | 
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                                       | 
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                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Sweitzer Caesar F           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        URKIEL WILLIAM S           | 
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                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        TURNER JIM L           | 
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                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        HAGGE STEPHEN J           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Muller Josef M           | 
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                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Lee Rose           | 
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                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2020-10-29           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        FEARON RICHARD H           | 
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                                       | 
                                       | 
              
          
                                                                                        | 2020-10-27           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        FEARON RICHARD H           | 
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                                       | 
                                       | 
                                       |