The Arlington, VA-based retail developer expects to net $40 million on the sale and plow back the proceeds into its huge malls, which have increasingly emphasized entertainment.

The deal will take place in two phases. It sold 10 of the centers on August 3 for $141 million and expects to sell its last one, Liberty Plaza in Philadelphia, within two to three months. That center is expected to sell for $28.2 million, netting about $14.5 million, Mills says. The Philadelphia center is being handled separately because of complications involving its underlying debt. The centers, which are dispersed throughout the East, Southeast and Midwest, total about 2.2 million sf.

The mills, on the other hand, average about 1.5 million sf each. They feature a combination of off-price and full-price retailers, specialty stores, dining, entertainment, along with interactive retailing such as a skateboarding store with a skating park attached to it.