Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 204,802	$ 291,320
Restricted cash	65,579
Accounts receivable, net of allowance for credit losses of $1,665 and $3,469, respectively	132,314	132,233
Other current assets	86,242	102,092
Total current assets	488,937	525,645
Property and equipment	2,956,804	2,948,907
Less accumulated depreciation	(1,197,712)	(1,165,943)
Property and equipment, net	1,759,092	1,782,964
Operating lease right-of-use assets	136,210	149,656
Other assets, net	37,510	40,013
Total assets	2,421,749	2,498,278
Current liabilities:
Accounts payable	55,148	50,022
Accrued liabilities	76,486	87,035
Current maturities of long-term debt	36,478	90,651
Current operating lease liabilities	50,321	51,599
Total current liabilities	218,433	279,307
Long-term debt	299,560	258,912
Operating lease liabilities	88,576	101,009
Deferred tax liabilities	100,655	110,821
Other non-current liabilities	3,105	3,878
Total liabilities	710,329	753,927
Redeemable noncontrolling interests	3,960	3,855
Shareholders' equity:
Common stock, no par, 240,000 shares authorized, 150,715 and 150,341 shares issued, respectively	1,286,380	1,327,592
Retained earnings	468,087	464,524
Accumulated other comprehensive loss	(47,007)	(51,620)
Total shareholders' equity	1,707,460	1,740,496
Total liabilities, redeemable noncontrolling interests and shareholders' equity	$ 2,421,749	$ 2,498,278