Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Purchase of common stock	$ (62,155)	$ 6,919
OPERATING ACTIVITIES:
Net earnings from continuing operations	21,815	25,812
Net earnings from discontinued operations	141	642
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortizations	101,971	91,147
Pension and post-retirement	10,146	5,190
Deferred income taxes	12,057	15,988
Amortization of stock-based compensation	2,248	1,968
Amortization of DHL promissory note	0	(1,550)
Net loss on financial instruments	3,443	(347)
Changes in assets and liabilities:
Accounts receivable	2,750	4,200
Inventory and prepaid supplies	(4,203)	1,089
Accounts payable	726	3,817
Unearned revenue	(2,883)	1,531
Accrued expenses, salaries, wages, benefits and other liabilities	4,267	(1,527)
Pension and post-retirement assets	(10,551)	(13,727)
Other	1,670	401
NET CASH PROVIDED BY OPERATING ACTIVITIES	143,597	134,634
INVESTING ACTIVITIES:
Capital expenditures	(182,106)	(110,973)
Proceeds from property and equipment	7	1,370
NET CASH (USED IN) INVESTING ACTIVITIES	(182,099)	(109,603)
FINANCING ACTIVITIES:
Principal payments on long term obligations	(23,623)	(53,197)
Proceeds from borrowings	155,000	20,000
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	67,991	(40,730)
Taxes paid for conversion of employee stock awards	(1,231)	614
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	29,489	(15,699)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	17,697	30,560
CASH AND CASH EQUIVALENTS AT END OF PERIOD	47,186	14,861
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	7,793	8,219
Federal alternative minimum and state income taxes paid	761	871
SUPPLEMENTAL NON-CASH INFORMATION:
Debt extinguished	0	1,550
Accrued capital expenditures	$ 19,721	$ 13,241