The arena layout seats 20,662 people but may be expanded to 39,500 if the upper level is opened. The stadium can also be converted into a smaller theatre facility (dubbed "Illusions Theater") with an intimate, enclosed environment that can accommodate up to 11,000 people using floor space and the north grandstand. It was built for the 1988 Summer Olympics as part of the city's bid for the games. However, they were not held in San Antonio because of financial difficulties related to the project. After the games, it was used primarily for college football and basketball games until 2001 when it became the new home of the NFL's San Diego Chargers. The team has been successful during their time there; including making the playoffs four out of five seasons. In 2007, the team won its first division title and made its first playoff appearance since 1994. The stadium is owned by the city of San Antonio but operated by a private company under a 30-year contract with the expectation that it will become profitable after that period. If it does not, the city has the right to purchase the stadium back. As of 2013, the price has not been disclosed but it is expected to be around $150 million. The venue was designed by HNTB Corporation and Cetel Construction Company. It features a flat roof that can be opened or closed in windy conditions, and a steel frame with concrete panels that cover the majority of the exterior.