The Houston-based insurance provider HCC Insurance Holdings ( HCC) said Thursday it acquired G.B. Kenrick for an undisclosed amount. Kenrick is an insurance underwriting agency located in Auburn Hills, Mich. Post acquisition, Kenrick will operate independently and expects to double its business to more than $100 million in premium in the next few years. It will report to the premier HCC underwriting agency, PIA, in Mt. Kisco, N.Y. The company said it expects further acquisitions. HCC stock was trading at $29.42, down 8 cents, Thursday.