"1", "1"], ["shares issued under employee stock purchase plan", "2013", "3", "3"], ["stock repurchase program", "2013", "-37 ( 37 )", "-37 ( 37 )"], ["balance december 31 2011", "1434", "-100 ( 100 )", "1334"], ["shares sold to optionees less shares exchanged", "2013", "4", "4"], ["shares issued under employee stock purchase plan", "2013", "4", "4"], ["stock repurchase program", "2013", "-14 ( 14 )", "-14 ( 14 )"], ["balance december 31 2012", "1434", "-106 ( 106 )", "1328"]]