Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Data [Table Text Block]

					Continuing Operations						Net Earnings
Quarter	Revenue		Gross Profit		Earnings		Per Share - Basic		Per Share - Diluted		Net Earnings		Per Share - Basic		Per Share - Diluted
2018
First	$	1,637,671	$	602,828	$	109,409	$	0.71	$	0.70	$	131,434	$	0.85	$	0.84
Second	1,798,094		665,236		166,456		1.10		1.08		139,959		0.92		0.91
Third	1,747,403		646,520		157,305		1.07		1.05		157,305		1.07		1.05
Fourth	1,808,950		644,972		157,975		1.08		1.07		141,569		0.97		0.96
	$	6,992,118	$	2,559,556	$	591,145	$	3.94	$	3.89	$	570,267	$	3.80	$	3.75
2017
First	$	1,583,210	$	575,853	$	155,088	$	1.00	$	0.99	$	172,247	$	1.11	$	1.09
Second	1,737,371		654,108		142,475		0.92		0.90		164,058		1.05		1.04
Third	1,747,775		649,193		159,455		1.02		1.01		178,912		1.15		1.14
Fourth	1,752,530		649,893		289,645		1.86		1.83		296,448		1.90		1.88
	$	6,820,886	$	2,529,047	$	746,663	$	4.80	$	4.73	$	811,665	$	5.21	$	5.15