Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 253,515	$ 291,320
Restricted cash	73,612
Accounts receivable, net of allowance for credit losses of $1,477 and $3,469, respectively	144,137	132,233
Other current assets	58,274	102,092
Total current assets	529,538	525,645
Property and equipment	2,938,154	2,948,907
Less accumulated depreciation	(1,280,509)	(1,165,943)
Property and equipment, net	1,657,645	1,782,964
Operating lease right-of-use assets	104,190	149,656
Other assets, net	34,655	40,013
Total assets	2,326,028	2,498,278
Current liabilities:
Accounts payable	87,959	50,022
Accrued liabilities	91,712	87,035
Current maturities of long-term debt	42,873	90,651
Current operating lease liabilities	55,739	51,599
Total current liabilities	278,283	279,307
Long-term debt	262,137	258,912
Operating lease liabilities	50,198	101,009
Deferred tax liabilities	86,966	110,821
Other non-current liabilities	975	3,878
Total liabilities	678,559	753,927
Commitments and contingencies
Redeemable noncontrolling interests		3,855
Shareholders' equity:
Common stock, no par, 240,000 shares authorized, 151,124 and 150,341 shares issued, respectively	1,292,479	1,327,592
Retained earnings	411,072	464,524
Accumulated other comprehensive loss	(56,082)	(51,620)
Total shareholders' equity	1,647,469	1,740,496
Total liabilities, redeemable noncontrolling interests and shareholders' equity	$ 2,326,028	$ 2,498,278