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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
CURRENT ASSETS    
Cash and cash equivalents $ 229,989 $ 363,378
Restricted cash 15,457 37,323
Short-term investments 725,063 819,478
Accounts receivable 106,578 62,659
Expendable parts, supplies and fuel, net of reserve of $8,079 and $6,041 35,546 27,500
Prepaid expenses and other current assets 161,636 28,073
TOTAL CURRENT ASSETS 1,274,269 1,338,411
Property and equipment (including $80,591 and $84,406 from VIEs, Note 6), net of accumulated depreciation of $814,837 and $696,178 2,810,693 2,259,507
Long-term investments 63,318 2,231
Deferred major maintenance, net of accumulated amortization of $108,779 and $75,177 157,410 146,850
Operating lease right-of-use assets, net 111,679 130,087
Deposits and other assets 93,928 113,987
TOTAL ASSETS: 4,511,297 3,991,073
CURRENT LIABILITIES    
Accounts payable 58,335 43,566
Accrued liabilities 259,164 162,892
Current operating lease liabilities 19,973 19,081
Current operating lease liabilities 379,459 307,453
Current maturities of long-term debt and finance lease obligations (including $9,315 and $9,000 from VIEs, Note 6), net of related costs of $6,599 and $7,751 152,900 130,053
TOTAL CURRENT LIABILITIES 869,831 663,045
LONG-TERM DEBT AND OTHER NONCURRENT LIABILITIES    
Long-term debt and finance lease obligations (including $69,812 and $79,127 from VIEs, Note 6), net of current maturities and related costs of $16,866 and $15,664 1,944,078 1,612,486
Deferred income taxes 346,388 346,137
Noncurrent operating lease liabilities 94,972 115,067
Other noncurrent liabilities 35,330 30,786
TOTAL LIABILITIES: 3,290,599 2,767,521
SHAREHOLDERS' EQUITY    
Common stock, par value $0.001, 100,000,000 shares authorized; 25,086,278 and 24,763,793 shares issued; 18,128,182 and 18,111,381 shares outstanding in 2022 and 2021 respectively 25 25
Treasury shares, at cost, 6,958,096 and 6,652,412 shares in 2022 and 2021, respectively (660,023) (638,057)
Additional paid in capital 709,471 692,053
Accumulated other comprehensive gain, net 1,257 2,056
Retained earnings 1,169,968 1,167,475
TOTAL EQUITY: 1,220,698 1,223,552
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY: $ 4,511,297 $ 3,991,073