Cousins Properties says it has extended by three years the maturity of a loan for its part of The Avenue Murfreesboro, which opened in 2007. The money had been due late last month but $8 million in principal payments, $1 million in fees and a higher interest rate — 3 points over LIBOR versus 1.15 percent earlier — helped that deadline disappear. Search Cousins' latest 10-Q for 'June 2010.'