CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents		$ 413,376	$ 451,025
Short-term investments		15,683	1,290
Accounts receivable, net of allowance of $52,584 and $52,895, respectively		297,388	327,397
Inventory, net		152,236	127,947
Other current assets		99,451	92,964
Total current assets		978,134	1,000,623
Property, plant and equipment, net		2,963,898	3,026,100
Restricted cash held in trust		105,444	284,841
Deferred income taxes		243,997	257,320
Other long-term assets		171,794	160,970
Total assets	[1]	4,463,267	4,729,854
Current liabilities:
Trade accounts payable		301,751	314,041
Accrued liabilities		206,223	247,575
Income taxes payable		31,052	27,990
Current lease liabilities		5,239	6,784
Total current liabilities		544,265	596,390
Long-term debt		2,503,250	2,537,540
Other long-term liabilities		308,492	377,671
Deferred income taxes		1,771	2,858
Total liabilities	[1]	3,357,778	3,514,459
Commitments and contingencies (Note 8)
Redeemable noncontrolling interest in subsidiary		513,817	678,604
Shareholders' equity:
Common shares, par value $0.05 per share: Authorized common shares 32,000; issued 10,635 and 10,505, respectively		531	525
Capital in excess of par value		3,537,574	3,536,373
Accumulated other comprehensive income (loss)		(10,290)	(11,038)
Retained earnings (accumulated deficit)		(1,809,414)	(1,841,153)
Less: treasury shares, at cost, 1,090 and 1,090 common shares, respectively		(1,315,751)	(1,315,751)
Total shareholders' equity		402,650	368,956
Noncontrolling interest		189,022	167,835
Total equity		591,672	536,791
Total liabilities and equity		$ 4,463,267	$ 4,729,854

[1] The condensed consolidated balance sheets as of June 30, 2023 and December 31, 2022 include assets and liabilities of variable interest entities. See Note 3—Joint Ventures for additional information.