Consolidated Condensed Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 72,559	$ 104,572
Receivables, net	793,599	754,644
Inventories	63,826	65,912
Prepaid expenses and other current assets	129,302	163,045
Total current assets	1,059,286	1,088,173
Revenue earning equipment, net of accumulated depreciation of $3,490,832 and $3,462,359, respectively	5,562,657	5,049,671
Operating property and equipment, net of accumulated depreciation of $938,591 and $911,717, respectively	620,448	624,180
Goodwill	377,539	377,306
Intangible assets	80,706	84,820
Direct financing leases and other assets	416,322	393,685
Total assets	8,116,958	7,617,835
Current liabilities:
Short-term debt and current portion of long-term debt	381,561	274,366
Accounts payable	494,420	391,827
Accrued expenses and other current liabilities	485,575	507,630
Total current liabilities	1,361,556	1,173,823
Long-term debt	3,364,087	3,107,779
Other non-current liabilities	862,839	896,587
Deferred income taxes	1,144,068	1,121,493
Total liabilities	6,732,550	6,299,682
Shareholders' equity:
Preferred stock of no par value per share - authorized, 3,800,917; none outstanding, June 30, 2012 or December 31, 2011	0	0
Common stock of $0.50 par value per share - authorized, 400,000,000; outstanding, June 30, 2012 - 51,123,202; December 31, 2011 - 51,143,946	25,562	25,572
Additional paid-in capital	787,534	769,383
Retained earnings	1,125,868	1,090,363
Accumulated other comprehensive loss	(554,556)	(567,165)
Total shareholders' equity	1,384,408	1,318,153
Total liabilities and shareholders' equity	$ 8,116,958	$ 7,617,835