Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Selected Quarterly Financial Information [Abstract]

Schedule of Quarterly Financial Information

2012 :	Net sales		Gross profit	Pre-tax earnings	Net earnings	Basic net earnings per share1
First quarter	$	768,875	394,177	161,129	100,194	0.34
Second quarter	804,890		415,151	179,039	112,306	0.38
Third quarter	802,577		414,375	175,836	109,320	0.37
Fourth quarter	757,235		390,821	158,151	98,716	0.33
Total	$	3,133,577	1,614,524	674,155	420,536	1.42

2011 :	Net sales		Gross profit	Pre-tax earnings	Net earnings	Basic net earnings per share1
First quarter	$	640,583	333,380	128,811	79,547	0.27
Second quarter	701,730		366,233	150,182	94,112	0.32
Third quarter	726,742		377,381	155,319	96,798	0.33
Fourth quarter	697,804		357,178	140,769	87,472	0.30
Total	$	2,766,859	1,434,172	575,081	357,929	1.21

¹ Note – Amounts may not foot due to rounding difference.