Thrift institutions posted another solid quarter in mortgage servicing operations during the final three months of 2005, lifting the industry to its first year in the black for servicing operations since 2000. According to data from the Office of Thrift Supervision, the industry posted $362.4 million in revenue from servicing loans for other investors, net of amortization and impairment expenses, during the fourth quarter of last year. That was down 37 percent from the previous… [One data table included]