Can't add fonts

I need to add in Myriad Pro Light and Regular to my documents since it's part of the branding for the government. Even though it's available with Adobe fonts, it doesn't show up under the text tab. When I click on text and fonts, Myriad Pro Bold and Bold Condensed show up, but not light or regular. When I click More Fonts, it doesn't show up there either. Is there a way to add those fonts to my project?