OLDWICK, N.J.–(BUSINESS WIRE)–AM Best has commented that the Credit Ratings (ratings) of Horace Mann Educators Corporation (Horace Mann) (headquartered in Springfield, IL) [NYSE: HMN] and its insurance operating subsidiaries are unchanged following the recent announcement that Horace Mann has signed a definitive agreement to acquire National Teachers Associates Life Insurance Company (NTA Life) (Addison, TX) and its subsidiary, NTA Life Insurance Company of New York (NTA Life of NY) (New York