Industrial Development Bank of India (IDBI) today reported a 6% increase in net profit at Rs 139.40 crore for the second quarter ended September 30, 2006 when compared with Rs 131.84 crore in Q2FY06.According to a release issued by the bank to the BSE today, total income increased to Rs 1,641.24 crore from Rs 1,568.17 crore in Q2FY06.