Condensed Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 1,014,080	$ 803,632
Accounts receivable, net	40,650	28,266
Aircraft maintenance deposits	77,590	73,415
Prepaid income taxes	2,835	72,278
Prepaid expenses and other current assets	48,624	48,749
Total current assets	1,183,779	1,026,340
Property and equipment:
Flight equipment	1,225,219	827,282
Ground and other equipment	103,986	82,459
Less accumulated depreciation	(90,577)	(65,524)
Total property and equipment	1,238,628	844,217
Deposits on flight equipment purchase contracts	249,360	286,837
Long-term aircraft maintenance deposits	201,925	206,485
Deferred heavy maintenance, net	75,172	89,127
Other long-term assets	81,336	77,539
Total assets	3,030,200	2,530,545
Current liabilities:
Accounts payable	27,728	17,043
Air traffic liability	283,851	216,831
Current maturities of long-term debt	78,596	49,637
Other current liabilities	217,370	182,729
Total current liabilities	607,545	466,240
Long-term debt, less current maturities	836,418	596,693
Long-term deferred income taxes	267,379	221,481
Deferred gains and other long-term liabilities	19,541	20,821
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	547,763	544,277
Treasury stock, at cost	(180,756)	(116,182)
Retained earnings	933,758	798,754
Accumulated other comprehensive loss	(1,455)	(1,546)
Total shareholders’ equity	1,299,317	1,225,310
Total liabilities and shareholders’ equity	$ 3,030,200	$ 2,530,545