Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 229,744	$ 253,515
Restricted cash	72,934	73,612
Accounts receivable, net of allowance for credit losses of $1,351 and $1,477, respectively	141,778	144,137
Other current assets	59,274	58,274
Total current assets	503,730	529,538
Property and equipment	2,916,214	2,938,154
Less accumulated depreciation	(1,306,162)	(1,280,509)
Property and equipment, net	1,610,052	1,657,645
Operating lease right-of-use assets	150,894	104,190
Other assets, net	42,694	34,655
Total assets	2,307,370	2,326,028
Current liabilities:
Accounts payable	97,531	87,959
Accrued liabilities	74,873	91,712
Current maturities of long-term debt	43,117	42,873
Current operating lease liabilities	41,464	55,739
Total current liabilities	256,985	278,283
Long-term debt	258,496	262,137
Operating lease liabilities	112,507	50,198
Deferred tax liabilities	86,244	86,966
Other non-current liabilities	392	975
Total liabilities	714,624	678,559
Commitments and contingencies
Shareholders' equity:
Common stock, no par, 240,000 shares authorized, 151,637 and 151,124 shares issued, respectively	1,292,935	1,292,479
Retained earnings	369,041	411,072
Accumulated other comprehensive loss	(69,230)	(56,082)
Total shareholders' equity	1,592,746	1,647,469
Total liabilities and shareholders' equity	$ 2,307,370	$ 2,326,028