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Business Combinations
9 Months Ended
Sep. 30, 2017
Business Combinations [Abstract]  
Business Combinations

12.

Business Combinations

In the first quarter 2016, the Company acquired the outstanding stock of Rocky Mountain Materials and Asphalt, Inc., and Rocky Mountain Premix Inc.  The acquisition provides more than 500 million tons of mineral reserves and expands the Company’s presence along the Front Range of the Rocky Mountains, home to 80% of Colorado’s population.  The acquired operations are reported through the West Group.  

In July 2016, the Company acquired the remaining interest in Ratliff Ready-Mix, L.P. (Ratliff), which operates ready mixed concrete plants in central Texas.  Prior to the acquisition, the Company owned a 40% interest in Ratliff which was accounted for under the equity method.  The Company was required to re-measure the existing 40% interest to fair value upon closing of the transaction, resulting in a gain of $5,863,000, which was recorded in other nonoperating income in third quarter 2016.  These operations are reported in the West Group.  

The impact of these acquisitions on the operating results was not considered material; therefore, pro forma financial information is not included.