Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Purchase of common stock	$ (10,818)	$ 2,595
OPERATING ACTIVITIES:
Net earnings from continuing operations	19,699	19,465
Net earnings from discontinued operations	94	428
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	66,600	60,393
Pension and post-retirement	6,764	3,460
Deferred income taxes	10,969	11,940
Amortization of stock-based compensation	1,575	1,645
Amortization of DHL promissory note	0	(1,550)
Net loss on financial instruments	(5,030)	(251)
Changes in assets and liabilities:
Accounts receivable	6,376	6,977
Inventory and prepaid supplies	(1,560)	1,082
Accounts payable	(2,552)	2,738
Unearned revenue	(3,141)	2,354
Accrued expenses, salaries, wages, benefits and other liabilities	(638)	(5,963)
Pension and post-retirement assets	(3,881)	(5,948)
Other	2,018	430
NET CASH PROVIDED BY OPERATING ACTIVITIES	97,293	97,200
INVESTING ACTIVITIES:
Capital expenditures	(125,076)	(76,308)
Proceeds from property and equipment	0	1,030
NET CASH (USED IN) INVESTING ACTIVITIES	(125,076)	(75,278)
FINANCING ACTIVITIES:
Principal payments on long term obligations	(12,623)	(47,091)
Proceeds from borrowings	60,000	20,000
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	35,328	(30,300)
Taxes paid for conversion of employee stock awards	(1,231)	614
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	7,545	(8,378)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	17,697	30,560
CASH AND CASH EQUIVALENTS AT END OF PERIOD	25,242	22,182
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	5,104	5,646
Federal alternative minimum and state income taxes paid	464	501
SUPPLEMENTAL NON-CASH INFORMATION:
Debt extinguished	0	1,550
Accrued capital expenditures	$ 5,923	$ 3,618