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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
CURRENT ASSETS: |  |
Cash and cash equivalents | $ 181,792 | $ 146,766
Marketable securities | 503,503 | 409,898
Restricted cash |  | 8,243
Income tax receivable | 5,316 | 6,989
Receivables, net | 42,731 | 46,916
Inventories, net | 119,755 | 118,509
Prepaid aircraft rents | 115,098 | 162,360
Other current assets | 26,938 | 18,111
Total current assets | 995,133 | 917,792
PROPERTY AND EQUIPMENT: |  |
Aircraft and rotable spares | 5,335,870 | 4,839,501
Deposits on aircraft | 49,000 | 38,800
Buildings and ground equipment | 265,608 | 261,704
Total property and equipment, gross | 5,650,478 | 5,140,005
Less-accumulated depreciation and amortization | (1,467,475) | (1,318,308)
Total property and equipment, net | 4,183,003 | 3,821,697
OTHER ASSETS |  |
Long-term prepaid assets | 230,923 | 218,505
Other long-term assets | 49,220 | 49,972
Total other assets | 280,143 | 268,477
Total assets | 5,458,279 | 5,007,966
CURRENT LIABILITIES: |  |
Current maturities of long-term debt | 309,678 | 305,460
Accounts payable | 288,904 | 241,215
Accrued salaries, wages and benefits | 154,367 | 139,885
Taxes other than income taxes | 19,228 | 15,618
Other current liabilities | 48,648 | 45,087
Total current liabilities | 820,825 | 747,265
OTHER LONG TERM LIABILITIES | 42,541 | 50,844
LONG TERM DEBT, net of current maturities | 2,377,346 | 2,240,051
DEFERRED INCOME TAXES PAYABLE | 419,020 | 565,404
DEFERRED AIRCRAFT CREDITS | 44,225 | 53,459
COMMITMENTS AND CONTINGENCIES (Note 5) |  |
STOCKHOLDERS' EQUITY: |  |
Preferred stock, 5,000,000 shares authorized; none issued |  |
Common stock, no par value, 120,000,000 shares authorized; 80,398,104 and 79,781,305 shares issued, respectively | 672,593 | 657,353
Retained earnings | 1,516,957 | 1,103,751
Treasury stock, at cost, 28,643,535 and 28,015,386 shares, respectively | (435,178) | (410,090)
Accumulated other comprehensive loss | (50) | (71)
Total stockholders' equity | 1,754,322 | 1,350,943
Total liabilities and stockholders' equity | $ 5,458,279 | $ 5,007,966

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