MUNCIE, IN and MUNSTER, IN--(Marketwired - May 13, 2013) - First Merchants Corporation (NASDAQ: FRME) and CFS Bancorp, Inc. (NASDAQ: CITZ) today announced they have executed a definitive agreement whereby CFS will merge with and into First Merchants, and its wholly-owned bank subsidiary, Citizens Financial Bank, will merge with and into First Merchants Bank, NA.