Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING ACTIVITIES:
Net earnings from continuing operations	$ 8,501	$ 6,662
Net loss from discontinued operations	(1)	(230)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	20,920	20,300
Pension and post-retirement	1,765	1,391
Deferred income taxes	5,005	3,905
Amortization of stock-based compensation	626	755
Amortization of DHL promissory note	(1,550)	(1,550)
Net gain on derivative instruments	(290)	(460)
Changes in assets and liabilities:
Accounts receivable	4,720	7,998
Inventory and prepaid supplies	1,263	567
Accounts payable	(1,866)	(3,768)
Unearned revenue	(1,261)	9,438
Accrued expenses, salaries, wages, benefits and other liabilities	(494)	(486)
Pension and post-retirement liabilities	(5,610)	(1,667)
Other	(1,078)	150
NET CASH PROVIDED BY OPERATING ACTIVITIES	30,650	43,005
INVESTING ACTIVITIES:
Capital expenditures	(59,369)	(46,759)
Proceeds from property and equipment	158	1,785
NET CASH (USED IN) INVESTING ACTIVITIES	(59,211)	(44,974)
FINANCING ACTIVITIES:
Principal payments on long term obligations	(12,858)	(1,851)
Proceeds from bank borrowings	60,000	25,000
Reimbursement of hangar construction costs	1,119	0
NET CASH PROVIDED BY FINANCING ACTIVITIES	48,261	23,149
NET INCREASE IN CASH AND CASH EQUIVALENTS	19,700	21,180
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	15,442	30,503
CASH AND CASH EQUIVALENTS AT END OF PERIOD	35,142	51,683
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	2,739	2,803
Federal alternative minimum and state income taxes paid	100	201
SUPPLEMENTAL NON-CASH INFORMATION:
Debt extinguished	1,550	1,550
Accrued capital expenditures	$ 5,867	$ 10,008