Condensed Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 902,809	$ 803,632
Accounts receivable, net	32,469	28,266
Aircraft maintenance deposits	79,276	73,415
Prepaid income taxes	0	72,278
Prepaid expenses and other current assets	54,760	48,749
Total current assets	1,069,314	1,026,340
Property and equipment:
Flight equipment	1,031,886	827,282
Ground and other equipment	93,724	82,459
Less accumulated depreciation	(76,703)	(65,524)
Total property and equipment	1,048,907	844,217
Deposits on flight equipment purchase contracts	289,835	286,837
Long-term aircraft maintenance deposits	196,470	206,485
Deferred heavy maintenance, net	80,144	89,127
Other long-term assets	78,578	77,539
Total assets	2,763,248	2,530,545
Current liabilities:
Accounts payable	23,017	17,043
Air traffic liability	263,430	216,831
Current maturities of long-term debt	53,012	49,637
Other current liabilities	228,137	182,729
Total current liabilities	567,596	466,240
Long-term debt, less current maturities	655,103	596,693
Long-term deferred income taxes	242,602	221,481
Deferred gains and other long-term liabilities	20,179	20,821
Shareholders’ equity:
Common stock	7	7
Additional paid-in-capital	545,377	544,277
Treasury stock, at cost	(126,779)	(116,182)
Retained earnings	860,674	798,754
Accumulated other comprehensive loss	(1,511)	(1,546)
Total shareholders’ equity	1,277,768	1,225,310
Total liabilities and shareholders’ equity	$ 2,763,248	$ 2,530,545