CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 472,246	$ 435,990
Short-term investments	9,500	16,506
Accounts receivable, net	362,977	453,042
Inventory, net	160,585	176,341
Assets held for sale	16,562	2,530
Other current assets	109,595	164,257
Total current assets	1,131,465	1,248,666
Property, plant and equipment, net	3,985,707	4,930,549
Goodwill		28,380
Deferred income taxes	247,171	305,844
Other long-term assets	139,085	247,219
Total assets	5,503,428	6,760,658
Current liabilities:
Trade accounts payable	220,922	295,159
Accrued liabilities	276,085	333,282
Income taxes payable	10,157	14,628
Current lease liabilities	8,305	13,479
Total current liabilities	515,469	656,548
Long-term debt	2,968,701	3,333,220
Other long-term liabilities	318,034	292,184
Deferred income taxes	1,576	3,149
Total liabilities	3,803,780	4,285,101
Commitments and contingencies (Note 8)
Redeemable noncontrolling interest in subsidiary (Note 13)	442,840	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 8,383 and 8,324, respectively	419	416
Capital in excess of par value	3,423,935	3,412,972
Accumulated other comprehensive income (loss)	(11,124)	(11,788)
Retained earnings (accumulated deficit)	(946,100)	(104,775)
Less: treasury shares, at cost, 1,090 and 1,056 common shares, respectively	(1,315,751)	(1,314,020)
Total shareholders' equity	1,151,384	1,982,811
Noncontrolling interest	105,424	67,354
Total equity	1,256,808	2,050,165
Total liabilities and equity	$ 5,503,428	$ 6,760,658