Consolidated Condensed Statements of Earnings (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Lease and rental revenues	$ 709,039	$ 693,912	$ 2,056,795	$ 2,007,393
Services revenue	718,292	667,399	2,115,419	2,021,284
Fuel services revenue	207,209	211,984	629,342	644,754
Total revenues	1,634,540	1,573,295	4,801,556	4,673,431
Cost of lease and rental	486,197	481,240	1,429,845	1,414,456
Cost of services	597,896	557,495	1,775,554	1,697,773
Cost of fuel services	203,369	207,689	618,288	632,599
Other operating expenses	32,728	32,966	103,987	100,881
Selling, general and administrative expenses	195,218	183,713	580,873	568,027
Gains on vehicle sales, net	(22,488)	(23,147)	(68,691)	(67,684)
Interest expense	33,967	34,879	102,322	105,266
Miscellaneous income, net	(3,447)	(1,424)	(11,592)	(7,245)
Restructuring and other (recoveries) charges, net	(298)	74	(298)	8,081
Total expenses	1,523,142	1,473,485	4,530,288	4,452,154
Earnings from continuing operations before income taxes	111,398	99,810	271,268	221,277
Provision for income taxes	37,523	35,499	94,016	75,323
Earnings from continuing operations	73,875	64,311	177,252	145,954
(Loss) earnings from discontinued operations, net of tax	(2,808)	10,780	(4,067)	10,181
Net earnings	$ 71,067	$ 75,091	$ 173,185	$ 156,135
Earnings (loss) per common share - Basic
Continuing operations	$ 1.41	$ 1.26	$ 3.42	$ 2.86
Discontinued operations	$ (0.05)	$ 0.21	$ (0.08)	$ 0.20
Net earnings	$ 1.36	$ 1.47	$ 3.34	$ 3.06
Earnings (loss) per common share - Diluted
Continuing operations	$ 1.40	$ 1.26	$ 3.39	$ 2.84
Discontinued operations	$ (0.05)	$ 0.21	$ (0.08)	$ 0.20
Net earnings	$ 1.35	$ 1.47	$ 3.31	$ 3.04
Cash dividends declared per common share	$ 0.34	$ 0.31	$ 0.96	$ 0.89