Apartment giant Aimco is partnering on the Kushner Companies’ massive downtown Fort Lauderdale development, The Real Deal has learned. The company also secured loans for two South Florida projects, according to its second quarter earnings report. Aimco reported a loss of $19.7 million in the quarter ending June 30. The Denver-based real estate investment trust, which stands for Apartment Investment and Management Company, took a 51 percent stake in the planned 3-million-square-foot, mixed-use project on