| 2020-03-23           | 
                                                                                        Current Reports           | 
                                                                                        8-K           | 
                                                                                        Report of unscheduled material events or corporate event           | 
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                                                                                        | 2020-03-16           | 
                                                                                        Proxy Filings           | 
                                                                                        DEF 14A           | 
                                                                                        Official notification to shareholders of matters to be brought to a vote ("Proxy")           | 
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                                                                                        | 2020-03-03           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        NOVAES DJALMA JR           | 
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                                                                                        | 2020-03-03           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        DONAHUE TIMOTHY J           | 
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                                                                                        | 2020-03-03           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Bourque Robert H Jr           | 
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                                                                                        | 2020-03-03           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Gifford Gerard H           | 
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                                                                                        | 2020-03-03           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        KELLY THOMAS A           | 
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                                                                                        | 2020-02-28           | 
                                                                                        Annual Filings           | 
                                                                                        10-K           | 
                                                                                        Annual report which provides a comprehensive overview of the company for the past year           | 
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                                                                                        | 2020-02-28           | 
                                                                                        Current Reports           | 
                                                                                        8-K/A           | 
                                                                                        Amendment to a previously filed 8-K           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        MILLER JAMES H           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        HAGGE STEPHEN J           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        CONWAY JOHN W           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Sweitzer Caesar F           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Funk Andrea J.           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        LITTLE WILLIAM G           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        OWENS B CRAIG           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Muller Josef M           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        LOLIGER HANS J           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        Lee Rose           | 
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                                                                                        | 2020-02-14           | 
                                                                                        3,4,5           | 
                                                                                        4           | 
                                                                                        Statement of changes in beneficial ownership of securities           | 
                                                                                        URKIEL WILLIAM S           | 
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