Consolidated Statements of Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Lease and rental revenues	$ 3,170,952	$ 3,121,553	$ 2,939,422
Services revenue	3,152,294	2,912,063	2,911,465
Fuel services revenue	463,738	538,277	787,887
Total revenues	6,786,984	6,571,893	6,638,774
Cost of lease and rental	2,234,284	2,153,450	2,036,881
Cost of services	2,602,978	2,413,156	2,447,867
Cost of fuel services	448,306	519,843	768,292
Other operating expenses	113,461	117,082	115,808
Selling, general and administrative expenses	842,697	844,497	816,975
Pension lump sum settlement expense	0	0	97,231
Used vehicle sales, net	(972)	(99,853)	(116,060)
Interest expense	147,843	150,434	144,739
Miscellaneous income, net	(13,068)	(10,156)	(13,613)
Restructuring and other charges, net	5,074	14,225	2,387
Total expenses	6,380,603	6,102,678	6,300,507
Earnings from continuing operations before income taxes	406,381	469,215	338,267
Provision for income taxes	141,741	163,226	118,042
Earnings from continuing operations	264,640	305,989	220,225
Loss from discontinued operations, net of tax	(2,163)	(1,221)	(1,884)
Net earnings	$ 262,477	$ 304,768	$ 218,341
Earnings (loss) per common share — Basic
Continuing operations (in dollars per share)	$ 4.98	$ 5.78	$ 4.18
Discontinued operations (in dollars per share)	(0.04)	(0.02)	(0.04)
Net earnings (in dollars per share)	4.94	5.75	4.14
Earnings (loss) per common share — Diluted
Continuing operations (in dollars per share)	4.94	5.73	4.14
Discontinued operations (in dollars per share)	(0.04)	(0.02)	(0.03)
Net earnings (in dollars per share)	$ 4.90	$ 5.71	$ 4.11