Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 260,595	$ 253,515
Restricted cash	2,505	73,612
Accounts receivable, net of allowance for credit losses of $1,563 and $1,477, respectively	153,314	144,137
Other current assets	68,990	58,274
Total current assets	485,404	529,538
Property and equipment	2,860,872	2,938,154
Less accumulated depreciation	(1,321,699)	(1,280,509)
Property and equipment, net	1,539,173	1,657,645
Operating lease right-of-use assets	139,262	104,190
Other assets, net	49,814	34,655
Total assets	2,213,653	2,326,028
Current liabilities:
Accounts payable	99,716	87,959
Accrued liabilities	85,180	91,712
Current maturities of long-term debt	8,133	42,873
Current operating lease liabilities	39,697	55,739
Total current liabilities	232,726	278,283
Long-term debt	258,977	262,137
Operating lease liabilities	103,548	50,198
Deferred tax liabilities	86,416	86,966
Other non-current liabilities	196	975
Total liabilities	681,863	678,559
Commitments and contingencies
Shareholders' equity:
Common stock, no par, 240,000 shares authorized, 151,714 and 151,124 shares issued, respectively	1,295,016	1,292,479
Retained earnings	339,342	411,072
Accumulated other comprehensive loss	(102,568)	(56,082)
Total shareholders' equity	1,531,790	1,647,469
Total liabilities and shareholders' equity	$ 2,213,653	$ 2,326,028