Consolidated Statements of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement [Abstract]
Lease and rental revenues	$ 2,695,376	$ 2,553,877	$ 2,309,816
Services revenue	2,707,013	2,609,174	2,109,748
Fuel services revenue	854,578	887,483	716,871
Total revenue	6,256,967	6,050,534	5,136,435
Cost of lease and rental	1,890,659	1,746,057	1,604,253
Cost of services	2,274,118	2,186,353	1,763,018
Cost of fuel services	838,673	873,466	699,107
Other operating expenses	135,904	129,180	134,224
Selling, general and administrative expenses	766,704	771,244	655,375
Gains on vehicle sales, net	(89,108)	(62,879)	(28,727)
Interest expense	140,557	133,164	129,994
Miscellaneous income, net	(11,727)	(9,093)	(7,114)
Restructuring and other charges, net	8,070	3,655	0
Total expenses	5,953,850	5,771,147	4,950,130
Earnings from continuing operations before income taxes	303,117	279,387	186,305
Provision for income taxes	102,218	108,019	61,697
Earnings from continuing operations	200,899	171,368	124,608
Loss from discontinued operations, net of tax	9,080	(1,591)	(6,438)
Net earnings	$ 209,979	$ 169,777	$ 118,170
Earnings (loss) per common share - Basic
Continuing operations (USD per share)	$ 3.93	$ 3.34	$ 2.38
Discontinued operations (USD per share)	$ 0.18	$ (0.03)	$ (0.13)
Net earnings (USD per share)	$ 4.11	$ 3.31	$ 2.25
Earnings (loss) per common share - Diluted
Continuing operations (USD per share)	$ 3.91	$ 3.31	$ 2.37
Discontinued operations (USD per share)	$ 0.18	$ (0.03)	$ (0.12)
Net earnings (USD per share)	$ 4.09	$ 3.28	$ 2.25