Complex sentence: The detention center opened in 2004 by Correctional Services Corporation (CSC) under a contract with The US Department of Homeland Security, and in 2005 CSC was purchased by the GEO Group thus acquiring the Northwest Detention Center.
Split into simpler sentences: The detention center opened in 2004 by Correctional Services Corporation (CSC) under a contract with The US Department of Homeland Security. In 2005, CSC was purchased by the GEO Group, thus acquiring the Northwest Detention Center.