[["unvested at december 31 2005", "stock-based performance awards 897200", "weightedaverage grantdate fair value $ 14.97", "restricted stock awards 1971112", "weightedaverage grantdate fair value $ 23.97"], ["granted", "135696 ( a )", "38.41", "437960", "40.45"], ["vested", "-546896 ( 546896 )", "19.15", "-777194 ( 777194 )", "20.59"], ["forfeited", "-12000 ( 12000 )", "16.81", "-79580 ( 79580 )", "26.55"], ["unvested at december 31 2006", "474000", "16.81", "1552298", "30