MARIETTA, Pa. (AP) — MARIETTA, Pa. (AP) — Donegal Group Inc. (DGICB) on Thursday reported profit of $18.2 million in its third quarter. The Marietta, Pennsylvania-based company said it had profit of 45 cents per share. Earnings, adjusted for investment costs, were 46 cents per share. The insurance company posted revenue of $237.7 million in...