Users can only see their own Expense Reports in Expense Transactions Real Time Subject Area?

I am trying to use the Expenses - Expense Transactions Real Time Subject Area in OTBI to create an Expense Report item lookup tool. Users would like to be able to search for expenses by amount, vendor, date, etc. to obtain the Expense Report number and other information. This subject area contains the information that we need. However, users can only see their own expense reports belonging to business units that they're authorized to use. We want users to see all expense reports no matter who the report owner is as long as it is associated with