Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
REVENUES	$ 143,279	$ 145,506
OPERATING EXPENSES
Salaries, wages and benefits	43,309	47,104
Fuel	14,361	13,840
Maintenance, materials and repairs	22,134	23,114
Depreciation and amortization	20,920	20,300
Travel	4,727	5,978
Rent	6,779	5,730
Landing and ramp	4,065	4,066
Insurance	1,511	2,010
Other operating expenses	9,060	9,562
Operating Expenses	126,866	131,704
OPERATING INCOME	16,413	13,802
OTHER INCOME (EXPENSE)
Interest income	21	28
Interest expense	(3,132)	(3,547)
Net gain on derivative instruments	290	460
Other Nonoperating Income (Expense)	(2,821)	(3,059)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	13,592	10,743
INCOME TAX EXPENSE	(5,091)	(4,081)
EARNINGS FROM CONTINUING OPERATIONS	8,501	6,662
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAXES	(1)	(230)
NET EARNINGS	$ 8,500	$ 6,432
BASIC EARNINGS PER SHARE
Continuing operations (in dollars per share)	$ 0.13	$ 0.11
Discontinued operations (in dollars per share)	$ 0.00	$ (0.01)
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	$ 0.13	$ 0.10
DILUTED EARNINGS PER SHARE
Continuing operations (in dollars per share)	$ 0.13	$ 0.10
Discontinued operations (in dollars per share)	$ 0.00	$ 0.00
TOTAL DILUTED NET EARNINGS PER SHARE (in dollars per share)	$ 0.13	$ 0.10
WEIGHTED AVERAGE SHARES
Basic (in shares)	63,810	63,431
Diluted (in shares)	64,524	64,374