For the first time in nearly three years, commercial banks and thrifts increased their mortgage servicing rights accounts during the fourth quarter of 2014, according to a new Inside Mortgage Trends analysis of call reports. At the end of last year, banks serviced residential mortgages with an unpaid principal balance of $4.416 trillion for other investors, an increase of $3.6 billion from the third quarter. That represents a tiny 0.08 percent increase ... [Includes one data chart]