Quarterly Data

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Quarterly Data (Unaudited) [Text Block]

19. Quarterly Data (Unaudited)

					Continuing Operations						Net Earnings
Quarter	Revenue		Gross Profit		Earnings		Per Share - Basic		Per Share - Diluted		Net Earnings		Per Share - Basic		Per Share - Diluted
2012
First	$	1,954,614	$	746,080	$	186,409	$	1.01	$	1.00	$	196,063	$	1.07	$	1.05
Second	2,038,289		777,102		205,156		1.12		1.10		214,101		1.17		1.15
Third	2,097,605		810,139		233,330		1.28		1.27		241,046		1.33		1.31
Fourth	2,013,831		773,744		208,224		1.17		1.16		159,860		0.90		0.89
	$	8,104,339	$	3,107,065	$	833,119	4.59		4.53		$	811,070	4.47		4.41
2011
First	$	1,659,048	$	656,133	$	155,145	$	0.83	$	0.82	$	194,905	$	1.04	$	1.03
Second	1,819,594		712,729		213,259		1.14		1.12		249,769		1.34		1.32
Third	1,999,550		757,608		207,515		1.12		1.10		172,280		0.93		0.91
Fourth	1,890,962		718,333		197,267		1.07		1.05		278,289		1.51		1.49
	$	7,369,154	$	2,844,803	$	773,186	4.16		4.09		$	895,243	4.82		4.74