Consolidated Condensed Statements of Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Total revenues	$ 2,089,338	$ 1,788,028	$ 3,992,805	$ 3,525,011
Other operating expenses	30,946	27,406	64,416	58,677
Selling, general and administrative expenses	212,923	201,464	421,776	402,559
Non-operating pension costs	858	6,587	2,080	13,917
Used vehicle sales, net	6,013	15,322	13,422	14,542
Interest expense	42,369	34,852	80,150	69,738
Miscellaneous income, net	(3,627)	(5,454)	(6,137)	(10,407)
Restructuring and other charges, net	3,615	(2,574)	19,409	(2,574)
Total expenses	1,991,055	1,707,174	3,846,422	3,383,535
Earnings from continuing operations before income taxes	98,283	80,854	146,383	141,476
Provision for income taxes	54,764	29,459	68,932	51,545
Earnings from continuing operations	43,519	51,395	77,451	89,931
Loss from discontinued operations, net of tax	(1,261)	(527)	(1,688)	(657)
Net earnings	$ 42,258	$ 50,868	$ 75,763	$ 89,274
Earnings (loss) per common share — Basic
Continuing operations (in dollars per share)	$ 0.83	$ 0.97	$ 1.47	$ 1.70
Discontinued operations (in dollars per share)	(0.02)	(0.01)	(0.03)	(0.01)
Net earnings (in dollars per share)	0.80	0.96	1.44	1.68
Earnings (loss) per common share — Diluted
Continuing operations (in dollars per share)	0.82	0.97	1.46	1.69
Discontinued operations (in dollars per share)	(0.02)	(0.01)	(0.03)	(0.01)
Net earnings (in dollars per share)	0.80	0.96	1.43	1.67
Cash dividends declared per common share (in dollars per share)	$ 0.52	$ 0.44	$ 1.04	$ 0.88
Lease and Rental
Total revenues	$ 858,024	$ 797,014	$ 1,682,277	$ 1,564,604
Cost of services sold	636,359	578,389	1,255,566	1,157,151
Service
Total revenues	1,072,324	865,841	2,000,468	1,706,528
Cost of services sold	906,048	729,578	1,693,286	1,432,478
Fuel Services
Total revenues	158,990	125,173	310,060	253,879
Cost of services sold	$ 155,551	$ 121,604	$ 302,454	$ 247,454