Quarterly Data

12 Months Ended

Dec. 31, 2015

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
2015
First	$	1,715,501	$	627,159	$	117,190	$	0.72	$	0.72	$	209,510	$	1.30	$	1.28
Second	1,758,628		654,568		155,634		0.98		0.97		332,396		2.10		2.07
Third	1,787,582		672,608		186,483		1.20		1.19		186,098		1.20		1.19
Fourth	1,694,600		613,809		136,574		0.88		0.87		141,825		0.92		0.91
	$	6,956,311	$	2,568,144	$	595,881	$	3.78	$	3.74	$	869,829	$	5.52	$	5.46
2014
First	$	1,802,570	$	707,859	$	170,041	$	1.00	$	0.99	$	160,138	$	0.94	$	0.93
Second	1,962,636		768,100		210,581		1.26		1.25		213,959		1.29		1.27
Third	2,009,575		774,422		225,683		1.36		1.34		231,844		1.40		1.38
Fourth	1,977,947		723,868		171,835		1.04		1.03		169,294		1.03		1.02
	$	7,752,728	$	2,974,249	$	778,140	$	4.67	$	4.61	$	775,235	$	4.65	$	4.59