[["", "number of performance share awards", "weighted-averagegrant-datefair value"], ["non-vestedat december 31 2016", "421600", "$ 48.00"], ["granted", "160196", "58.02"], ["vested", "-95183 ( 95183 )", "45.13"], ["forfeited", "-58285 ( 58285 )", "48.22"], ["non-vestedat december 31 2017", "428328", "$ 52.35"]]