DALLAS, Jun 28, 2010 (BUSINESS WIRE) -- Capital Senior Living Corporation (the "Company") /quotes/comstock/13*!csu/quotes/nls/csu (CSU 4.91, +0.08, +1.66%) , one of the country's largest operators of senior living communities, today announced that it has entered into a definitive agreement with Signature Assisted Living of Texas, LLC ("Signature") to acquire Signature's interests in 12 leases with Health Care REIT, Inc. /quotes/comstock/13*!hcn/quotes/nls/hcn (HCN 42.68, -0.07, -0.16%) .