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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Current assets:    
Cash and cash equivalents $ 6,377 $ 5,566
Trade accounts receivable, net 745,288 624,294
Other receivables 67,926 106,986
Inventories 18,577 23,191
Prepaid expenses 107,513 97,888
Total current assets 945,681 857,925
Property and equipment, at cost:    
Revenue and service equipment 3,820,439 3,636,767
Land 46,827 39,026
Structures and improvements 175,900 154,142
Furniture and office equipment 215,749 189,516
Total property and equipment 4,258,915 4,019,451
Less accumulated depreciation 1,440,124 1,318,122
Net property and equipment 2,818,791 2,701,329
Other assets 64,516 70,290
Total assets 3,828,988 3,629,544
Current liabilities:    
Trade accounts payable 384,308 340,332
Claims accruals 109,745 104,220
Accrued payroll 51,929 59,420
Other accrued expenses 27,152 28,445
Total current liabilities 573,134 532,417
Long-term debt 986,278 998,003
Other long-term liabilities 64,881 58,552
Deferred income taxes 790,634 740,220
Total liabilities 2,414,927 2,329,192
Commitments and contingencies (Note 10)
Stockholders’ equity:    
Preferred stock, $100 par value. 10 million shares authorized; none outstanding 0 0
Common stock, $.01 par value. 1 billion shares authorized; (167,099,432 shares issued at December 31, 2016 and 2015, of which 111,305,021 shares and 113,947,780 shares were outstanding at December 31, 2016 and 2015, respectively) 1,671 1,671
Additional paid-in capital 293,087 268,728
Retained earnings 3,218,943 2,885,843
Treasury stock, at cost (55,794,411 shares at December 31, 2016, and 53,151,652 shares at December 31, 2015) (2,099,640) (1,855,890)
Total stockholders’ equity 1,414,061 1,300,352
Total liabilities and stockholders' equity $ 3,828,988 $ 3,629,544