Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]



	Quarter
	First		Second		Third		Fourth		Full Year
	(In thousands, except per share data)
Year Ended December 31,
2014
Total revenues	$	2,260,863	$	2,511,638	$	2,626,448	$	2,538,940	$	9,937,889
Gross profit	338,122		369,148		374,709		365,959		1,447,938
Net income	31,303		16,862		26,162		18,677		93,004
Basic earnings per share ⁽¹⁾	1.29		0.70		1.07		0.77		3.82
Diluted earnings per share ⁽¹⁾	1.19		0.62		1.03		0.77		3.60
2013
Total revenues	$	1,963,832	$	2,335,110	$	2,340,147	$	2,279,492	$	8,918,581
Gross profit	300,489		341,274		329,462		321,321		1,292,546
Net income	22,118		37,388		32,765		21,721		113,992
Basic earnings per share ⁽¹⁾	0.95		1.53		1.34		0.89		4.72
Diluted earnings per share ⁽¹⁾	0.88		1.43		1.19		0.81		4.32

⁽¹⁾ The sum of the quarterly income per share amounts may not equal the annual amount reported, as per share amounts are computed independently for each quarter and for the full year based on the respective weighted average common shares outstanding.