Changes in Operations (Tables)

9 Months Ended

Sep. 30, 2016

Business Acquisition, Pro Forma Information [Table Text Block]

The following pro forma financial information does not include the impact of any costs to integrate the operations or the impact of derivative instruments that the Company has entered into or may enter into to mitigate interest rate risk (dollars in thousands, except per share amounts):

	Nine Months Ended
	September 30, 2015
Operating revenues	$	1,642,167
Net income	$	163,988
Basic earnings per common share	$	2.89
Diluted earnings per common share	$	2.84