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May 11, 2016 DEFA14A Additional definitive proxy soliciting materials and Rule 14(a)(12) material htmlhtml  
May 11, 2007 DEFA14A Additional definitive proxy soliciting materials and Rule 14(a)(12) material htmlhtml  
Jun 14, 2005 DEFA14A Additional definitive proxy soliciting materials and Rule 14(a)(12) material htmlhtml  
Nov 05, 2002 DEFA14A Additional definitive proxy soliciting materials and Rule 14(a)(12) material texttxt  
Oct 18, 2000 DEFA14A Additional definitive proxy soliciting materials and Rule 14(a)(12) material texttxt  
Apr 29, 2021 DEFA14A Additional definitive proxy soliciting materials and Rule 14(a)(12) material htmlhtml  
Mar 28, 2018 10-K Annual report htmlhtml   xbrlxbrl  
Apr 17, 2017 10-K Annual report htmlhtml   xbrlxbrl  
Apr 14, 2016 10-K Annual report htmlhtml   xbrlxbrl  
Mar 12, 2015 10-K Annual report htmlhtml   xbrlxbrl