Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
OPERATING ACTIVITIES:
Net earnings (loss) from continuing operations	$ (19,625)	$ 41,648	$ 23,865
Net loss from discontinued operations	(3)	(774)	(673)
Adjustments to reconcile net earnings to net cash provided by operating activities:
Impairment of aircraft	0	0	22,065
Impairment of goodwill and acquired intangibles	52,585	0	5,079
Depreciation and amortization	91,749	84,477	91,063
Pension and post-retirement	7,061	5,562	(2,641)
Deferred income taxes	18,772	23,749	17,126
Amortization of stock-based compensation	2,732	3,231	2,877
Amortization of DHL promissory note	(6,200)	(6,200)	(6,200)
Net (gain) loss on derivative instruments	(631)	(1,879)	4,881
Write-off of unamortized debt issuance costs	0	0	2,886
Changes in assets and liabilities:
Accounts receivable	(4,994)	(4,328)	1,980
Inventory and prepaid supplies	(900)	(1,759)	(13)
Accounts payable	2,012	(5,688)	(1,715)
Unearned revenue	(6,205)	654	9,337
Accrued expenses, salaries, wages, benefits and other liabilities	(112)	4,898	(8,209)
Pension and post-retirement assets	(38,352)	(27,926)	(23,159)
Other	(3,478)	(5,032)	(2,443)
NET CASH PROVIDED BY OPERATING ACTIVITIES	94,411	110,633	133,220
INVESTING ACTIVITIES:
Capital expenditures	(112,712)	(155,243)	(213,083)
Proceeds from property and equipment	1,521	5,772	11,147
Proceeds from the redemption of interest-bearing investments	0	0	1,750
Reimbursement of Hanger Construction Costs	6,803	0	0
NET CASH (USED IN) INVESTING ACTIVITIES	(104,388)	149,471	200,186
FINANCING ACTIVITIES:
Principal payments on long term obligations	(53,766)	(26,223)	(214,424)
Proceeds from borrowings	80,000	50,000	265,000
Financing fees	0	0	(2,536)
NET CASH PROVIDED BY FINANCING ACTIVITIES	26,234	23,777	48,040
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	16,257	(15,061)	(16,040)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	15,442	30,503	46,543
CASH AND CASH EQUIVALENTS AT END OF PERIOD	31,699	15,442	30,503
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	13,752	13,195	12,985
Federal alternative minimum and state income taxes paid	1,313	377	2,448
SUPPLEMENTAL NON-CASH INFORMATION:
Debt extinguished	6,200	6,200	6,200
Accrued capital expenditures	$ 1,055	$ 4,770	$ 10,921