Quarterly Financial Data (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Quarterly Financial Data - (Details) [Abstract]
Net sales	$ 739,204	$ 712,705	$ 699,871	$ 645,309	$ 679,479	$ 605,088	$ 567,104	$ 534,441	$ 2,797,089	$ 2,386,112	$ 2,049,668
Gross profit	405,849	382,556	377,063	350,096	371,865	321,749	301,947	279,565	1,515,564	1,275,126	1,043,138
Income from operations	187,354	167,215	163,970	142,000	166,158	128,233	119,187	100,716	660,539	514,294	395,396
Net earnings	$ 121,676	$ 110,281	$ 106,311	$ 88,979	$ 107,311	$ 84,263	$ 71,281	$ 59,725	$ 427,247	$ 322,580	$ 239,481
Earnings from continuing operations per common share:
Basic	$ 1.26	$ 1.15	$ 1.11	$ 0.93	$ 1.13	$ 0.89	$ 0.76	$ 0.64	$ 4.45	$ 3.42	$ 2.64
Diluted	$ 1.23	$ 1.12	$ 1.08	$ 0.91	$ 1.10	$ 0.87	$ 0.74	$ 0.62	$ 4.34	$ 3.34	$ 2.58