OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has revised the outlooks to stable from negative and affirmed the Financial Strength Rating of A- (Excellent) and the Long-Term Issuer Credit Ratings of “a-” of Pennsylvania Lumbermens Mutual Insurance Company (PLM) (Philadelphia, PA), Indiana Lumbermens Mutual Insurance Company (ILM) and ILM’s subsidiary, National Building Material Assurance Company (NBMA), collectively known as Pennsylvania Lumbermens Group, which operate under an inter-company poolin
