Consolidated Statements Of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Consolidated Statements Of Earnings [Abstract]
Net sales	$ 2,766,859		$ 2,269,471		$ 1,930,330
Cost of sales	1,332,687		1,094,635		946,895
Gross profit	1,434,172		1,174,836		983,435
Operating and administrative expenses	859,369		745,112		686,792
Loss on sale of property and equipment	194		35		850
Operating income	574,609		429,689		295,793
Interest income	472		951		1,697
Earnings before income taxes	575,081		430,640		297,490
Income tax expense	217,152		165,284		113,133
Net earnings	$ 357,929		$ 265,356		$ 184,357
Basic net earnings per share	$ 1.21	[1]	$ 0.90	[1]	$ 0.62
Diluted net earnings per share	$ 1.21		$ 0.90		$ 0.62
Basic weighted average shares outstanding	295,053,790		294,861,424		296,715,970
Diluted weighted average shares outstanding	295,868,726		294,861,424		296,715,970

[1] Note - Amounts may not foot due to rounding difference.