India is close to accepting an offer from Fairfax Financial Holdings Ltd. for IDBI Bank Ltd., possibly at a slightly higher price, according to people with knowledge of the matter, in what could potentially be the biggest foreign investment in the country’s banking sector. Fairfax, whose earlier bid for IDBI Bank failed to meet the government’s reserve price, is considering increasing its offer by a few rupees per share, the people said, asking not to be identified as the deliberations are private. They declined to share specifics.