.0 million , $ 2.3 million and $ 4.6 million , respectively , of construction-in-progress costs , primarily associated with sites that it no longer planned to build . restructuring expense 2014the following table displays activity with respect to the accrued restructuring liability for the years ended december 31 , 2004 , 2005 and 2006 ( in thousands ) : liability as of january 1 , expense payments liability december 31 , expense payments liability december 31 , expense payments liability december 31 .