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Consolidated Balance Sheets (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
ASSETS  
Cash and cash equivalents$ 439,084$ 421,420
Marketable securities11,230 
Trade accounts receivable, net635,972539,849
Other accounts receivable51,35679,065
Operating supplies, at lower of average cost or market24,39723,868
Prepaid expenses30,99547,345
Deferred income taxes50,1748,530
Total Current Assets1,243,2081,120,077
Property, Plant and Equipment  
Land194,818194,818
Buildings and leasehold improvements822,398817,599
Revenue equipment1,543,3211,480,561
Other equipment312,158306,215
Total Property, Plant and Equipment2,872,6952,799,193
Accumulated depreciation(1,437,167)(1,394,608)
Net Property, Plant and Equipment1,435,5281,404,585
Other Assets  
Deferred charges and other assets37,99339,107
Capitalized software, net20,32919,083
Marketable securities5,5686,039
Intangible assets, net14,81817,191
Goodwill338,188337,650
Total Noncurrent Assets416,896419,070
Total Assets3,095,6322,943,732
LIABILITIES AND SHAREHOLDERS' EQUITY  
Accounts payable363,525304,176
Accrued liabilities232,500203,231
Self-insurance accruals100,726105,857
Short-term borrowings15,43918,552
Current maturities of long-term debt and capital leases19,62320,074
Total Current Liabilities731,813651,890
Long-Term Liabilities  
Long-term debt718,305718,215
Long-term obligations under capital leases61,23275,735
Self-insurance accruals162,472169,311
Employee benefits348,773418,731
Other liabilities and deferred credits39,59441,789
Deferred income taxes135,17148,529
Total Liabilities2,197,3602,124,200
Commitments and Contingencies (Note 10)  
Shareholders' Equity  
Common stock, $0.625 par value; authorized 100,000,000 shares; issued 63,057,046 and 62,750,994 shares, respectively39,38939,143
Additional paid-in capital, common stock594,346580,008
Retained earnings861,794821,187
Cost of repurchased common stock (7,468,659 and 7,884,597 shares, respectively)(322,454)(340,912)
Total Common Shareholders' Equity1,173,0751,099,426
Accumulated Other Comprehensive Loss(274,803)(279,894)
Total Shareholders' Equity898,272819,532
Total Liabilities and Shareholders' Equity$ 3,095,632$ 2,943,732