Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
REVENUES	$ 138,904	$ 153,554	$ 282,183	$ 299,060
OPERATING EXPENSES
Salaries, wages and benefits	41,964	44,570	85,273	91,674
Fuel	12,440	14,084	26,801	27,924
Maintenance, materials and repairs	25,005	25,270	47,139	48,384
Depreciation and amortization	21,765	21,514	42,685	41,814
Travel	4,772	5,566	9,499	11,544
Rent	6,791	6,244	13,570	11,974
Landing and ramp	1,972	3,880	6,037	7,946
Insurance	1,396	1,826	2,907	3,836
Other operating expenses	8,630	8,998	17,690	18,560
Operating Expenses	124,735	131,952	251,601	263,656
OPERATING INCOME	14,169	21,602	30,582	35,404
OTHER INCOME (EXPENSE)
Interest income	18	38	39	66
Interest expense	(3,554)	(3,671)	(6,686)	(7,218)
Net gain on derivative instruments	452	202	742	662
Other Nonoperating Income (Expense)	(3,084)	(3,431)	(5,905)	(6,490)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	11,085	18,171	24,677	28,914
INCOME TAX EXPENSE	(4,170)	(6,952)	(9,261)	(11,033)
EARNINGS FROM CONTINUING OPERATIONS	6,915	11,219	15,416	17,881
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAXES	(1)	(160)	(2)	(390)
NET EARNINGS	$ 6,914	$ 11,059	$ 15,414	$ 17,491
BASIC EARNINGS PER SHARE
Continuing operations (in dollars per share)	$ 0.11	$ 0.18	$ 0.24	$ 0.28
Discontinued operations (in dollars per share)	$ 0.00	$ (0.01)	$ 0.00	$ 0.00
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	$ 0.11	$ 0.17	$ 0.24	$ 0.28
DILUTED EARNINGS PER SHARE
Continuing operations (in dollars per share)	$ 0.11	$ 0.17	$ 0.24	$ 0.28
Discontinued operations (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ (0.01)
TOTAL DILUTED NET EARNINGS PER SHARE (in dollars per share)	$ 0.11	$ 0.17	$ 0.24	$ 0.27
WEIGHTED AVERAGE SHARES
Basic (in shares)	64,050	63,431	63,931	63,431
Diluted (in shares)	64,859	64,393	64,692	64,383