Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Data (Unaudited) [Abstract]

Quarterly Data

					Continuing Operations						Net Earnings
Quarter	Revenue		Gross Profit		Earnings		Per Share - Basic		Per Share - Diluted		Net Earnings		Per Share - Basic		Per Share - Diluted
2011
First	$	1,812,078	$	711,751	$	174,791	$	0.94	$	0.92	$	194,905	$	1.04	$	1.03
Second		1,994,970		775,996		239,198		1.28		1.26		249,769		1.34		1.32
Third		2,138,606		806,282		223,438		1.20		1.19		172,280		0.93		0.91
Fourth		2,004,486		757,395		208,938		1.13		1.12		278,289		1.51		1.49
	$	7,950,140	$	3,051,424	$	846,365		4.55		4.48	$	895,243		4.82		4.74
2010
First	$	1,481,055	$	590,452	$	122,288	$	0.65	$	0.65	$	108,127	$	0.58	$	0.58
Second		1,664,447		658,824		167,226		0.90		0.89		169,870		0.91		0.90
Third		1,757,253		680,557		216,331		1.16		1.15		223,759		1.20		1.19
Fourth		1,737,436		686,772		184,906		0.99		0.97		198,348		1.06		1.04
	$	6,640,191	$	2,616,605	$	690,751		3.70		3.65	$	700,104		3.75		3.70