CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 504,985	$ 435,990
Short-term investments	8,840	16,506
Accounts receivable, net	347,212	453,042
Inventory, net	164,029	176,341
Assets held for sale	562	2,530
Other current assets	137,384	164,257
Total current assets	1,163,012	1,248,666
Property, plant and equipment, net	4,225,034	4,930,549
Goodwill		28,380
Deferred income taxes	277,897	305,844
Other long-term assets	151,365	247,219
Total assets	5,817,308	6,760,658
Current liabilities:
Trade accounts payable	216,495	295,159
Accrued liabilities	247,181	333,282
Income taxes payable	12,872	14,628
Current lease liabilities	9,470	13,479
Total current liabilities	486,018	656,548
Long-term debt	3,290,303	3,333,220
Other long-term liabilities	239,684	292,184
Deferred income taxes	3,053	3,149
Total liabilities	4,019,058	4,285,101
Commitments and contingencies (Note 8)
Redeemable noncontrolling interest in subsidiary (Note 3)	438,486	425,392
Shareholders' equity:
Preferred shares, par value $0.001 per share: Series A 6% Cumulative Mandatory Convertible; $50 per share liquidation preference; outstanding 4,870 and 5,613, respectively	5	6
Common shares, par value $0.05 per share: Authorized common shares 32,000; issued 8,385 and 8,324, respectively	419	416
Capital in excess of par value	3,419,467	3,412,972
Accumulated other comprehensive income (loss)	(18,630)	(11,788)
Retained earnings (accumulated deficit)	(829,862)	(104,775)
Less: treasury shares, at cost, 1,090 and 1,056 common shares, respectively	(1,315,751)	(1,314,020)
Total shareholders' equity	1,255,648	1,982,811
Noncontrolling interest	104,116	67,354
Total equity	1,359,764	2,050,165
Total liabilities and equity	$ 5,817,308	$ 6,760,658