Lines of Business (Policies)

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

Segment Reporting

The accounting policies of our segments are essentially the same as those described in the summary of significant accounting policies included in our 2013 Annual Report on Form 10-K. We evaluate the performance of our segments based on gross profit and operating income. For purposes of reviewing the operating performance of our segments, all intercompany sales and purchases are generally accounted for as if they were transactions with independent third parties at current market prices.