The parent company of the Honolulu Star-Bulletin on Thursday announced it was purchasing longtime rival The Honolulu Advertiser, the largest newspaper in Hawaii. Oahu Publications Inc. said it will acquire the Advertiser, its Web site, non-daily publications and an interest in Hawaii.com from Gannett Co. The Advertiser, one of Gannett's larger newspapers with a daily circulation of 130,000, was founded in 1856 and purchased by Gannett in 1993. Financial terms were not disclosed. The deal is subject to regulatory and other approvals and is expected to close in the second quarter.