Interdisciplinary degrees can really be a crapshoot. Coming from an area studies background, my MA program was at a state flagship that also had a pretty robust interdisciplinary area studies PhD. Some of the alums from that department left academia entirely, at least one ended up on the tenure track in history at an Ivy within the last couple of years. The degree is what you make of it and the sorts of jobs you'll get after you finish are highly dependent both on what you do during the program, and the luck of timing.