american tower corporation and subsidiaries notes to consolidated financial statements 2014 ( continued ) 3.00% ( 3.00 % ) convertible notes 2014the 3.00% ( 3.00 % ) convertible notes due august 15 , 2012 ( 3.00% ( 3.00 % ) notes ) mature on august 15 , 2012 , and interest is payable semi-annually in arrears on february 15 and august 15 of each year . the 3.00% ( 3