Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 489,422	$ 255,015
Trade and other accounts receivable, net	341,739	350,765
Inventories, net	50,955	61,641
Assets held for sale	0	141
Prepaid and other current assets	47,571	20,492
Total current assets	929,687	688,054
Operating lease right-of-use assets	48,477	54,503
Finance lease right-of-use assets	6,953	9,511
Property and equipment (net of accumulated depreciation of $795,049 and $723,060)	635,279	709,404
Goodwill	104,198	137,458
Intangible assets (net of accumulated amortization of $38,152 and $35,333)	54,801	55,021
Other noncurrent assets	7,464	10,956
Total assets	1,786,859	1,664,907
Current liabilities:
Accounts payable	166,697	115,251
Accrued expenses	209,799	234,895
Customer contract liabilities	3,000	60
Current maturities of long-term operating lease liabilities	20,214	23,473
Current maturities of long-term finance lease liabilities	3,104	4,594
Current maturities of long-term debt	177,302	2,311
Other current liabilities	2,730	5,610
Total current liabilities	582,846	386,194
Long-term operating lease liabilities, less current maturities	31,642	35,123
Long-term finance lease liabilities, less current maturities	4,057	4,844
Long-term debt, net of unamortized deferred financing costs and unamortized debt discount, less current maturities	334,804	335,312
Other noncurrent liabilities	15,803	16,662
Total noncurrent liabilities	386,306	391,941
Total liabilities	969,152	778,135
Stockholders' equity
Common stock, par value $0.01 per share (authorized 500,000 shares, issued and outstanding 213,333 and 212,410 shares, respectively)	2,133	2,124
Paid-in capital in excess of par value	972,482	966,762
Retained earnings	(146,614)	(73,333)
Accumulated other comprehensive loss	(10,294)	(8,781)
Total stockholders' equity	817,707	886,772
Total liabilities and stockholders' equity	$ 1,786,859	$ 1,664,907