| 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Sweitzer Caesar F           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        HAGGE STEPHEN J           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        MILLER JAMES H           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Muller Josef M           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Funk Andrea J.           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        FEARON RICHARD H           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        OWENS B CRAIG           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        WILLIAMS MARSHA C           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-05-05           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Wilson Dwayne Andree           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-04-29           | 
                                                                                        Quarterly Filings           | 
                                                                                        10-Q           | 
                                                                                        Quarterly report which provides a continuing view of a company's financial position           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-04-25           | 
                                                                                        Current Reports           | 
                                                                                        8-K           | 
                                                                                        Report of unscheduled material events or corporate event           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-03-21           | 
                                                                                        Current Reports           | 
                                                                                        8-K           | 
                                                                                        Report of unscheduled material events or corporate event           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-03-21           | 
                                                                                        Proxy Filings           | 
                                                                                        DEF 14A           | 
                                                                                        Official notification to shareholders of matters to be brought to a vote ("Proxy")           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-03-17           | 
                                                                                        Current Reports           | 
                                                                                        8-K           | 
                                                                                        Report of unscheduled material events or corporate event           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-03-15           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        GOH HOCK HUAT           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-03-07           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        GOH HOCK HUAT           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-03-04           | 
                                                                                        3,4,5           | 
                                                                                        3           | 
                                                                                        Initial filing by director officer or owner of more than ten percent.           | 
                                                                                        WILLIAMS MARSHA C           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-03-01           | 
                                                                                        Current Reports           | 
                                                                                        8-K           | 
                                                                                        Report of unscheduled material events or corporate event           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-02-28           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Gifford Gerard H           | 
                                       | 
                                       | 
                                       | 
                                       | 
              
          
                                                                                        | 2022-02-28           | 
                                                                                        Annual Filings           | 
                                                                                        10-K           | 
                                                                                        Annual report which provides a comprehensive overview of the company for the past year           | 
                                                                                                   | 
                                       | 
                                       | 
                                       | 
                                       |