Consolidated Condensed Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 73,429	$ 66,392
Receivables, net	772,262	775,765
Inventories	61,672	64,146
Prepaid expenses and other current assets	154,972	133,934
Total current assets	1,062,335	1,040,237
Revenue earning equipment, net of accumulated depreciation of $3,485,433 and $3,514,910, respectively	5,987,803	5,754,608
Operating property and equipment, net of accumulated depreciation of $987,312 and $966,220, respectively	626,932	624,853
Goodwill	383,371	384,216
Intangible assets	75,520	80,475
Direct financing leases and other assets	424,386	434,590
Total assets	8,560,347	8,318,979
Current liabilities:
Short-term debt and current portion of long-term debt	258,697	367,975
Accounts payable	458,627	398,983
Accrued expenses and other current liabilities	479,302	505,707
Total current liabilities	1,196,626	1,272,665
Long-term debt	3,655,710	3,452,821
Other non-current liabilities	939,682	948,932
Deferred income taxes	1,220,970	1,177,074
Total liabilities	7,012,988	6,851,492
Shareholders' equity:
Preferred stock of no par value per share - authorized, 3,800,917; none outstanding, June 30, 2013 or December 31, 2012	0	0
Common stock of $0.50 par value per share - authorized, 400,000,000; outstanding, June 30, 2013 - 52,326,720; December 31, 2012 - 51,371,696	26,163	25,686
Additional paid-in capital	860,650	808,230
Retained earnings	1,291,005	1,221,190
Accumulated other comprehensive loss	(630,459)	(587,619)
Total shareholders' equity	1,547,359	1,467,487
Total liabilities and shareholders' equity	$ 8,560,347	$ 8,318,979