Business Combinations (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

The purchase price and initial assessment of the fair value of the assets acquired and liabilities assumed in the business combination we completed during 2013 were as follows (in thousands):



Purchase price allocation:	$	192,000
Fair value of assets acquired (liabilities assumed):
Property, plant and equipment	$	192,422
Other current assets	2,048
Current environmental liabilities	(2,470		)
Total	$	192,000

The following amounts from our business combination were included in our operating results since the date of acquisition through December 31, 2013 (in thousands):



Revenue	$	12,661
Operating profit	$	6,400

Business Acquisition, Pro Forma Information [Table Text Block]

These pro forma results are for comparative purposes only and may not be indicative of the results that would have occurred had this acquisition been completed on January 1, 2012 or the results that will be attained in the future (in thousands).



	Year Ended December 31, 2012				Year Ended December 31, 2013
	As Reported		Pro-Forma		As Reported		Pro-Forma
Revenue	$	1,772,074	$	1,812,635	$	1,897,606	$	1,924,316
Net income	$	435,670	$	442,096	$	582,237	$	591,377