Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2014

Discontinued Operations and Disposal Groups [Abstract]

Summary of the components of discontinued operations activity

The following table summarizes the components of discontinued operations activity:

	Years Ended December 31,
	2014		2013		2012
	(Thousands)
Operating revenues	$	—	$	332,947	$	314,821
Income from discontinued operations before income taxes	2,377		251,378		81,328
Income taxes	1,006		159,535		33,835
Income from discontinued operations, net of tax	$	1,371	$	91,843	$	47,493