In general a very simple way to accomplish what you want - get rid of stuff before a certain symbol is encountered in the string - is to use the Text To Columns tool and use the symbol in question as the delimiter. In this case, if you insert a Text To Columns tool, use "-" as a delimiter (don't include the citation marks in the tool, just the hyphen), split into 2 columns, leave extra characters in last column, then you should be good to go; the 2nd column generated should then include the information you want, and only that (however you may also need to add a data cleansing tool after the Text To Columns tool to remove any potential leading spaces in the column, as well as a select tool to remove the unnecessary first column). A derived benefit from using the Text To Column tool this way is that you get to keep track of the information you remove from the string - it's easy to find out what was 'lost', if it turns out later on that you actually need that part of the string as well.
