Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 66,392	$ 104,572
Receivables, net	775,765	754,644
Inventories	64,146	65,912
Prepaid expenses and other current assets	133,934	163,045
Total current assets	1,040,237	1,088,173
Revenue earning equipment, net of accumulated depreciation of $3,514,910 and $3,462,359, respectively	5,754,608	5,049,671
Operating property and equipment, net of accumulated depreciation of $966,220 and $911,717, respectively	624,853	624,180
Goodwill	384,216	377,306
Intangible assets	80,475	84,820
Direct financing leases and other assets	434,590	393,685
Total assets	8,318,979	7,617,835
Current liabilities:
Short-term debt and current portion of long-term debt	367,975	274,366
Accounts payable	398,983	391,827
Accrued expenses and other current liabilities	505,707	507,630
Total current liabilities	1,272,665	1,173,823
Long-term debt	3,452,821	3,107,779
Other non-current liabilities	948,932	896,587
Deferred income taxes	1,177,074	1,121,493
Total liabilities	6,851,492	6,299,682
Shareholders' equity:
Preferred stock of no par value per share — authorized, 3,800,917; none outstanding, December 31, 2012 or 2011	0	0
Common stock of $0.50 par value per share — authorized, 400,000,000; outstanding, December 31, 2012 — 51,371,696; December 31, 2011 — 51,143,946	25,686	25,572
Additional paid-in capital	808,230	769,383
Retained earnings	1,221,190	1,090,363
Accumulated other comprehensive loss	(587,619)	(567,165)
Total shareholders' equity	1,467,487	1,318,153
Total liabilities and shareholders' equity	$ 8,318,979	$ 7,617,835