For the second time in its history, Darien Lake Theme Park will be owned by Six Flags Entertainment Corp. The Kansas City-based Six Flags will acquire Darien Lake along with theme parks in Phoenix, Houston and Oklahoma City. All are owned by EPR Properties. Terms were not disclosed. The deal is expected to close next month. Six Flags owned the 1,000-acre Genesee County theme park from 1999 to 2007, a period with significant investment in new rides and attractions. EPR just invested $5 million...