Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 310,166	$ 218,476
Trade and other accounts receivable, net	443,741	397,197
Inventories, net	73,415	66,395
Prepaid and other current assets	49,571	43,947
Total current assets	876,893	726,015
Operating lease right-of-use assets	29,178	18,659
Finance lease right-of-use assets	93,565	43,714
Property and equipment (net of accumulated depreciation of $1,034,693 and $1,002,684)	796,197	679,513
Goodwill	192,780	192,780
Intangible assets (net of accumulated amortization of $90,873 and $82,043)	48,373	50,586
Deferred income taxes	112,926	0
Other noncurrent assets	13,654	15,901
Total assets	2,163,566	1,727,168
Current liabilities:
Accounts payable	347,589	202,936
Accrued expenses	191,053	281,715
Customer contract liabilities	19,377	19,377
Current maturities of long-term operating lease liabilities	9,930	6,083
Current maturities of long-term finance lease liabilities	52,605	19,855
Current maturities of long-term debt	14,176	14,004
Other current liabilities	5,446	9,368
Total current liabilities	640,176	553,338
Long-term operating lease liabilities, less current maturities	17,856	13,267
Long-term finance lease liabilities, less current maturities	21,479	11,925
Long-term debt, net of unamortized deferred financing costs and unamortized debt discount, less current maturities	340,327	347,425
Other noncurrent liabilities	14,477	11,294
Total noncurrent liabilities	394,139	383,911
Total liabilities	1,034,315	937,249
Stockholders' equity
Common stock, par value $0.01 per share (authorized 500,000 shares, issued and outstanding 228,549 and 233,995 shares, respectively)	2,285	2,340
Paid-in capital in excess of par value	942,563	1,007,492
Retained earnings (deficit)	177,862	(226,195)
Accumulated other comprehensive income	6,541	6,282
Total stockholders' equity	1,129,251	789,919
Total liabilities and stockholders' equity	$ 2,163,566	$ 1,727,168