Condensed Consolidated Statements of Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Net sales	$ 997,827	$ 949,938	$ 1,951,144	$ 1,826,439
Cost of sales	495,740	467,271	965,007	895,294
Gross profit	502,087	482,667	986,137	931,145
Operating and administrative expenses	276,644	276,016	557,031	545,859
Gain on sale of property and equipment	(390)	(196)	(498)	(412)
Operating income	225,833	206,847	429,604	385,698
Interest income	63	129	162	249
Interest expense	(797)	(194)	(1,155)	(320)
Earnings before income taxes	225,099	206,782	428,611	385,627
Income tax expense	84,742	76,268	160,648	143,182
Net earnings	$ 140,357	$ 130,514	$ 267,963	$ 242,445
Basic net earnings per share	$ 0.48	$ 0.44	$ 0.91	$ 0.82
Diluted net earnings per share	$ 0.48	$ 0.44	$ 0.91	$ 0.82
Basic weighted average shares outstanding	291,176,985	296,691,232	293,191,566	296,666,992
Diluted weighted average shares outstanding	291,830,137	297,578,419	293,870,152	297,534,473