Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Selected Quarterly Financial Information [Abstract]

Schedule of Quarterly Financial Information

(Amounts in thousands except per share information)

2015 :	Net Sales		Gross Profit	Pre-tax Earnings	Net Earnings	Basic Net Earnings per Share	Diluted Net Earnings per Share
First quarter	$	953,317	484,050	203,512	127,606	0.43	0.43
Second quarter	997,827		502,087	225,099	140,357	0.48	0.48
Third quarter	995,250		502,225	219,204	136,494	0.47	0.47
Fourth quarter	922,793		460,572	178,205	111,904	0.39	0.39
Total	$	3,869,187	1,948,934	826,020	516,361	1.77	1.77

2014 :	Net Sales		Gross Profit	Pre-tax Earnings	Net Earnings	Basic Net Earnings per Share	Diluted Net Earnings per Share
First quarter	$	876,501	448,478	178,845	111,931	0.38	0.38
Second quarter	949,938		482,667	206,782	130,514	0.44	0.44
Third quarter	980,814		498,693	212,988	133,314	0.45	0.45
Fourth quarter	926,254		467,564	188,819	118,391	0.40	0.40
Total	$	3,733,507	1,897,402	787,434	494,150	1.67	1.66