Consolidated Condensed Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 54,424	$ 54,196
Accounts receivable, trade, less allowance of $9,976 and $9,169, respectively	482,006	460,518
Other receivables	165,205	24,449
Inventories and supplies	12,568	11,140
Prepaid taxes, licenses and permits	8,803	17,549
Other current assets	49,399	63,361
Total current assets	772,405	631,213
Property and equipment	2,703,628	2,557,825
Less – accumulated depreciation	1,032,948	944,582
Property and equipment, net	1,670,680	1,613,243
Goodwill	74,404	74,618
Intangible assets, net	52,597	55,315
Other non-current assets	278,501	229,324
Total assets	2,848,587	2,603,713
Current liabilities:
Checks issued in excess of cash balances	6,032	0
Accounts payable	126,178	93,987
Current portion of long-term debt	5,000	5,000
Insurance and claims accruals	221,219	72,594
Accrued payroll	57,624	44,333
Accrued expenses	30,274	28,758
Other current liabilities	24,653	24,011
Total current liabilities	470,980	268,683
Long-term debt, net of current portion	440,000	422,500
Other long-term liabilities	43,782	43,314
Insurance and claims accruals, net of current portion	242,094	237,220
Deferred income taxes	269,307	268,499
Total liabilities	1,466,163	1,240,216
Commitments and contingencies
Temporary equity:
Temporary equity - redeemable noncontrolling interest	38,552	35,947
Stockholders’ equity:
Common stock, $0.01 par value, 200,000,000 shares authorized; 80,533,536 shares issued; 63,415,565 and 65,790,112 shares outstanding, respectively	805	805
Paid-in capital	124,065	121,904
Retained earnings	1,777,092	1,667,104
Accumulated other comprehensive loss	(14,584)	(20,604)
Treasury stock, at cost; 17,117,971 and 14,743,424 shares, respectively	(543,506)	(441,659)
Total stockholders’ equity	1,343,872	1,327,550
Total liabilities, temporary equity and stockholders’ equity	$ 2,848,587	$ 2,603,713