Consolidated Condensed Statements of Earnings (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Lease and rental revenues	$ 688,048	$ 675,623	$ 1,347,756	$ 1,313,481
Service revenue	707,666	675,533	1,397,127	1,353,885
Fuel services revenue	208,285	212,704	422,133	432,770
Total revenues	1,603,999	1,563,860	3,167,016	3,100,136
Cost of lease and rental	473,528	474,272	943,648	933,216
Cost of services	592,221	564,609	1,177,658	1,140,278
Cost of fuel services	204,626	209,337	414,919	424,910
Other operating expenses	33,291	33,664	71,259	67,913
Selling, general and administrative expenses	195,842	189,332	385,655	384,316
Gains on vehicle sales, net	(23,197)	(22,546)	(46,203)	(44,537)
Interest expense	33,901	35,622	68,355	70,387
Miscellaneous income, net	(3,575)	(1,341)	(8,145)	(5,821)
Restructuring and other charges, net	0	7,142	0	8,007
Total expenses	1,506,637	1,490,091	3,007,146	2,978,669
Earnings from continuing operations before income taxes	97,362	73,769	159,870	121,467
Provision for income taxes	34,787	27,002	56,493	39,824
Earnings from continuing operations	62,575	46,767	103,377	81,643
Loss from discontinued operations, net of tax	(381)	(44)	(1,259)	(599)
Net earnings	$ 62,194	$ 46,723	$ 102,118	$ 81,044
Earnings (loss) per common share - Basic
Continuing operations	$ 1.21	$ 0.92	$ 2.00	$ 1.60
Discontinued operations	$ (0.01)	$ 0.00	$ (0.02)	$ (0.01)
Net earnings	$ 1.20	$ 0.92	$ 1.98	$ 1.59
Earnings (loss) per common share - Diluted
Continuing operations	$ 1.19	$ 0.91	$ 1.98	$ 1.59
Discontinued operations	$ 0.00	$ 0.00	$ (0.02)	$ (0.01)
Net earnings	$ 1.19	$ 0.91	$ 1.96	$ 1.58
Cash dividends declared per common share	$ 0.31	$ 0.29	$ 0.62	$ 0.58