Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 360,281	$ 423,384
Restricted cash	20,379	19,434
Short-term investments	203,333
Accounts receivable, net	94,833	74,245
Spare parts and supplies, net	17,071	19,767
Deferred tax assets, net	17,325	17,325
Prepaid expenses and other	32,893	51,652
Total	746,115	605,807
Property and equipment, less accumulated depreciation and amortization of $346,750 and $327,102 as of June 30, 2014 and December 31, 2013, respectively	1,624,155	1,334,332
Other Assets:
Long-term prepayments and other	85,545	91,953
Restricted cash		1,566
Intangible assets, less accumulated amortization of $33,114 and $175,730 as of June 30, 2014 and December 31, 2013, respectively	22,620	23,940
Goodwill	106,663	106,663
Total Assets	2,585,098	2,164,261
Current Liabilities:
Accounts payable	87,886	89,787
Air traffic liability	537,088	409,086
Other accrued liabilities	94,650	97,571
Current maturities of long-term debt, less discount, and capital lease obligations	156,025	62,187
Total	875,649	658,631
Long-Term Debt and Capital Lease Obligations	915,110	744,286
Other Liabilities and Deferred Credits:
Accumulated pension and other postretirement benefit obligations	266,489	264,106
Other liabilities and deferred credits	60,375	59,424
Deferred tax liability, net	51,529	40,950
Total	378,393	364,480
Commitments and Contingencies
Shareholders’ Equity:
Special preferred stock, $0.01 par value per share, three shares issued and outstanding as of June 30, 2014 and December 31, 2013
Common stock, $0.01 par value per share, 53,747,583 and 52,423,085 shares issued and outstanding as of June 30, 2014 and December 31, 2013, respectively	537	524
Capital in excess of par value	275,128	269,884
Accumulated income	191,394	169,142
Accumulated other comprehensive loss, net	(51,113)	(42,686)
Total	415,946	396,864
Total Liabilities and Shareholders’ Equity	$ 2,585,098	$ 2,164,261