NEW YORK--(BUSINESS WIRE)--Kroll Bond Rating Agency (KBRA) released a comment on Heartland Financial USA, Inc. and Premier Valley Bank Merger. Headquartered in Dubuque, Iowa with total assets of $6.51 billion as of March 31, 2015, Heartland Financial USA, Inc. (NASDAQ: HTLF, or “Heartland Financial”) is the bank holding company of ten subsidiary banks and a consumer finance company offering banking, mortgage, investment, insurance, wealth management, and consumer finance services to customers s