Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES:
Net earnings from continuing operations	$ 23,215	$ 29,437
Net loss from discontinued operations	(2)	(576)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	66,077	62,871
Pension and post-retirement	5,295	4,172
Deferred income taxes	13,736	17,682
Amortization of stock-based compensation	2,123	2,668
Amortization of DHL promissory note	(4,650)	(4,650)
Net gain on derivative instruments	(425)	(956)
Changes in assets and liabilities:
Accounts receivable	2,183	2,618
Inventory and prepaid supplies	(2,516)	(2,509)
Accounts payable	(157)	(4,811)
Unearned revenue	(5,676)	4,002
Accrued expenses, salaries, wages, benefits and other liabilities	1,520	3,811
Pension and post-retirement liabilities	(35,771)	(24,689)
Other	(3,439)	(2,106)
NET CASH PROVIDED BY OPERATING ACTIVITIES	61,513	86,964
INVESTING ACTIVITIES:
Capital expenditures	(96,766)	(108,339)
Proceeds from property and equipment	1,337	3,484
NET CASH (USED IN) INVESTING ACTIVITIES	(95,429)	(104,855)
FINANCING ACTIVITIES:
Principal payments on long term obligations	(47,928)	(9,399)
Proceeds from bank borrowings	80,000	25,000
Reimbursement of hangar construction costs	3,266	0
NET CASH PROVIDED BY FINANCING ACTIVITIES	35,338	15,601
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1,422	(2,290)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	15,442	30,503
CASH AND CASH EQUIVALENTS AT END OF PERIOD	16,864	28,213
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	9,976	9,240
Federal alternative minimum and state income taxes paid	1,014	272
SUPPLEMENTAL NON-CASH INFORMATION:
Debt extinguished	4,650	4,650
Accrued capital expenditures	$ 1,394	$ 15,390