CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 771,878	$ 472,246
Short-term investments	6	9,500
Accounts receivable, net of allowance of $69,456 and $69,807, respectively	282,726	362,977
Inventory, net	136,992	160,585
Assets held for sale	16,785	16,562
Other current assets	114,240	109,595
Total current assets	1,322,627	1,131,465
Property, plant and equipment, net	3,443,737	3,985,707
Deferred income taxes	256,679	247,171
Other long-term assets	151,783	139,085
Total assets	5,174,826	5,503,428
Current liabilities:
Trade accounts payable	251,740	220,922
Accrued liabilities	235,356	276,085
Income taxes payable	23,056	10,157
Current lease liabilities	5,936	8,305
Total current liabilities	516,088	515,469
Long-term debt	3,075,520	2,968,701
Other long-term liabilities	346,327	318,034
Deferred income taxes	2,215	1,576
Total liabilities	3,940,150	3,803,780
Commitments and contingencies (Note 8)
Redeemable noncontrolling interest in subsidiary (Note 3)	400,853	442,840
Shareholders' equity:
Preferred shares, par value $0.001 per share: Series A 6% Cumulative Mandatory Convertible; $50 per share liquidation preference; outstanding 0 and 4,870, respectively		5
Common shares, par value $0.05 per share: Authorized common shares 32,000; issued 9,332 and 8,383, respectively	466	419
Capital in excess of par value	3,450,408	3,423,935
Accumulated other comprehensive income (loss)	(10,872)	(11,124)
Retained earnings (accumulated deficit)	(1,415,230)	(946,100)
Less: treasury shares, at cost, 1,090 and 1,090 common shares, respectively	(1,315,751)	(1,315,751)
Total shareholders' equity	709,021	1,151,384
Noncontrolling interest	124,802	105,424
Total equity	833,823	1,256,808
Total liabilities and equity	$ 5,174,826	$ 5,503,428