OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has removed from under review with positive implications and upgraded the financial strength rating to A- (Excellent) from B++ (Good) and the issuer credit rating to "a-" from "bbb" of Security Life Insurance Company of America (Security Life) (Minnetonka, MN). The outlook assigned to each rating is stable. The rating actions follow the recent public announcement regarding the completion of the acquisition of Security Life by Ameritas Life Insurance Cor