In fiscal year 2012, BOP had a budget of about $6.6 billion for salaries and expenses and as of December 2011, BOP had a staff of about 38,000, which includes administrative, program, and support staff responsible for all of BOP's activities nationwide. BOP houses inmates across six geographic regions in 117 federal institutions, 15 privately managed prisons, 185 RRCs (also known as halfway houses), and home detention.