Hi Travis,
At this time, we have a couple different options. First, you could run the Interaction Details Report with the voice media type selected, but you'd need to select a subset of users for the report. You could also take a look at the Interactions search view located under the Performance tab. On that view, you can apply various filters to see the data you want, and at a later date, export capabilities will be added to that view, which will allow you to see all of your calls for a given time period.