CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 19,636	$ 117,524
Accounts receivable, net of allowance for credit losses of $8,216 and $8,493 at June30, 2022 and December 31, 2021, respectively	473,153	356,083
Federal and state income taxes receivable	187	67
Inventory	53,528	42,359
Other	74,714	67,620
Total current assets	621,218	583,653
Property and equipment, net	2,289,371	2,331,755
Right of use asset	22,815	19,024
Intangible assets, net	7,166	7,537
Deposits on equipment purchases	5,212	849
Other	11,376	11,055
Deferred tax assets, net	2,819	3,975
Total assets	2,959,977	2,957,848
Current liabilities:
Accounts payable	252,692	190,219
Federal and state income taxes payable	803	232
Accrued liabilities	189,203	238,511
Lease liability	5,723	6,891
Total current liabilities	448,421	435,853
Long-term lease liability	21,607	18,108
Long-term debt, net of debt discount and issuance costs of $6,016 and $6,432 at June 30, 2022 and December 31, 2021, respectively	877,739	852,323
Deferred tax liabilities, net	25,464	29,234
Other	10,665	12,843
Total liabilities	1,383,896	1,348,361
Commitments and contingencies (see Note 9)
Stockholders' equity:
Preferred stock, par value $0.01; authorized 1,000,000 shares, no shares issued	0	0
Common stock, par value $0.01; Common stock, par value $0.01; authorized 400,000,000 shares with 302,325,853 and 299,268,967 issued and 216,821,730 and 215,139,972 outstanding at June 30, 2022 and December 31, 2021, respectively	3,023	2,993
Additional paid-in capital	3,191,678	3,171,536
Retained deficit	(222,714)	(198,316)
Accumulated other comprehensive income	0	5,915
Treasury stock, at cost, 85,504,123 and 84,128,995 shares at June 30, 2022 and December 31, 2021, respectively	(1,395,906)	(1,372,641)
Total stockholders' equity	1,576,081	1,609,487
Total liabilities and stockholders' equity	$ 2,959,977	$ 2,957,848