Idlewild is the name of TMBG's own record label. Idlewild was the popular nickname of New York International, until it was renamed John F. Kennedy airport in 1964, and there are probably still a few people who call it Idlewild. As this name is a bit of New York historical geography with a transportation angle, was supplanted by a president from their home state, and is made up of two words that can be complimentary or contradictory, depending on the meaning you choose, it seems to be an ideal name for the band to use.