Idlewild Country Club is an 18-hole private golf course in Flossmoor, Illinois, built in 1908 and designed by Al Naylor. It sits in the $$$ (premium) price range for golf in Illinois. The season runs Feb 1 to Dec 1 (closed on Mondays). Play is generally limited to members and their guests.
Details like fees and seasons change, so call the course before you head out.