. we pursue opportunities to dispose of land in markets with a high concentration of undeveloped land and in those markets where the land no longer meets our strategic development plans . the increase was partially attributable to a land sale to a current corporate tenant for potential future expansion . we recorded $ 424000 and $ 560000 of impairment charges associated with contracts to sell land parcels for the years ended december 31 , 2004 and 2003 , respectively