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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 552,970 $ 313,302
Trade accounts receivable, net 1,219,162 1,124,403
Prepaid expenses and other 359,867 404,412
Total current assets 2,131,999 1,842,117
Property and equipment, at cost 5,953,231 5,908,710
Less accumulated depreciation 2,302,310 2,219,816
Net property and equipment 3,650,921 3,688,894
Goodwill and intangible assets, net 208,399 212,122
Other assets 171,287 185,215
Total assets 6,162,606 5,928,348
Current liabilities:    
Trade accounts payable 641,887 587,510
Claims accruals 279,315 276,056
Accrued payroll and payroll taxes 161,311 130,943
Other accrued expenses 83,887 90,294
Total current liabilities 1,166,400 1,084,803
Long-term debt 1,301,430 1,305,424
Other long-term liabilities 249,692 245,961
Deferred income taxes 723,018 692,022
Stockholders' equity 2,722,066 2,600,138
Total liabilities and stockholders' equity $ 6,162,606 $ 5,928,348