american tower corporation and subsidiaries notes to consolidated financial statements 2014 ( continued ) ati 7.25% ( 7.25 % ) notes 2014during the year ended december 31 , 2006 , the company repurchased in privately negotiated transactions $ 74.9 million principal amount of ati 7.25% ( 7.25 % ) notes for $ 77.3 million in cash . in connection with these transactions , the company recorded a charge of $ 3