Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current Assets
Cash and cash equivalents	$ 730,349	$ 910,965
Restricted cash	10,554	10,052
Accounts receivable, net of allowance of $4,178 and $4,003, respectively	297,264	305,905
Prepaid expenses, assets held for sale and other current assets	93,910	99,100
Total current assets	1,132,077	1,326,022
Property and Equipment
Flight equipment	5,507,628	5,449,100
Ground equipment	103,498	101,824
Less: accumulated depreciation	(1,360,736)	(1,319,636)
Flight equipment purchase deposits and modifications in progress	438,308	352,422
Property and equipment, net	4,688,698	4,583,710
Other Assets
Operating lease right-of-use assets	130,748	138,744
Deferred costs and other assets	317,993	329,971
Intangible assets, net and goodwill	63,289	64,796
Total Assets	6,332,805	6,443,243
Current Liabilities
Accounts payable	122,751	82,885
Accrued liabilities	615,134	641,978
Current portion of long-term debt and finance leases	607,999	639,811
Current portion of long-term operating leases	55,587	55,383
Total current liabilities	1,401,471	1,420,057
Other Liabilities
Long-term debt and finance leases	1,615,305	1,655,075
Long-term operating leases	152,150	166,022
Deferred taxes	371,518	354,798
Financial instruments and other liabilities	31,031	37,954
Total other liabilities	2,170,004	2,213,849
Commitments and contingencies	0	0
Stockholders’ Equity
Preferred stock, $1 par value; 10,000,000 shares authorized; no shares issued	0	0
Common stock, $0.01 par value; 100,000,000 shares authorized; 35,071,410 and 34,707,860 shares issued, 28,363,266 and 29,215,702 shares outstanding (net of treasury stock), as of March 31, 2022 and December 31, 2021, respectively	351	347
Additional paid-in capital	828,391	934,516
Treasury stock, at cost; 6,708,144 and 5,492,158 shares, respectively	(317,480)	(225,461)
Accumulated other comprehensive loss	(433)	(511)
Retained earnings	2,250,501	2,100,446
Total stockholders’ equity	2,761,330	2,809,337
Total Liabilities and Equity	$ 6,332,805	$ 6,443,243