Consolidated Statements of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Net sales	$ 858,424	$ 802,577	$ 2,512,346	$ 2,376,342
Cost of sales	415,029	388,202	1,204,350	1,152,639
Gross profit	443,395	414,375	1,307,996	1,223,703
Operating and administrative expenses	254,957	238,814	753,042	708,322
Gain on sale of property and equipment	(112)	(158)	(568)	(266)
Operating income	188,550	175,719	555,522	515,647
Interest income	118	117	733	357
Interest expense	(25)	0	(61)	0
Earnings before income taxes	188,643	175,836	556,194	516,004
Income tax expense	69,293	66,516	206,787	194,184
Net earnings	$ 119,350	$ 109,320	$ 349,407	$ 321,820
Basic net earnings per share	$ 0.40	$ 0.37	$ 1.18	$ 1.09
Diluted net earnings per share	$ 0.40	$ 0.37	$ 1.17	$ 1.08
Basic weighted average shares outstanding	296,842,771	296,237,956	296,755,815	295,964,359
Diluted weighted average shares outstanding	297,716,375	297,178,746	297,701,324	297,083,700