Banks reported a modest decline in mortgage banking income during the second quarter of 2012, but the business continued to generate strong profits, according to a new analysis of call report data by Inside Mortgage Trends. Commercial banks, thrifts and bank holding companies reported a total of $7.91 billion in non-interest income from single-family mortgage banking activity during the second quarter. That was down 0.8 percent from the first three months of the year, but it still ranked ... [Includes one chart]