Condensed Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 825,904	$ 803,632
Investment securities	100,083	0
Accounts receivable, net	35,892	28,266
Aircraft maintenance deposits	87,105	73,415
Prepaid income taxes	6,060	72,278
Prepaid expenses and other current assets	48,455	48,749
Total current assets	1,103,499	1,026,340
Property and equipment:
Flight equipment	1,386,310	834,927
Ground property and equipment	109,451	74,814
Less accumulated depreciation	(105,653)	(65,524)
Total property and equipment	1,390,108	844,217
Deposits on flight equipment purchase contracts	272,690	286,837
Long-term aircraft maintenance deposits	198,426	206,485
Deferred heavy maintenance, net	79,878	89,127
Other long-term assets	85,024	77,539
Total assets	3,129,625	2,530,545
Current liabilities:
Accounts payable	29,906	17,043
Air traffic liability	238,793	216,831
Current maturities of long-term debt	84,443	49,637
Other current liabilities	217,779	182,729
Total current liabilities	570,921	466,240
Long-term debt, less current maturities	894,809	596,693
Long-term deferred income taxes	299,231	221,481
Deferred gains and other long-term liabilities	20,108	20,821
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	549,375	544,277
Treasury stock, at cost	(218,572)	(116,182)
Retained earnings	1,015,140	798,754
Accumulated other comprehensive loss	(1,394)	(1,546)
Total shareholders’ equity	1,344,556	1,225,310
Total liabilities and shareholders’ equity	$ 3,129,625	$ 2,530,545