Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
OPERATING ACTIVITIES:
Net earnings from continuing operations	$ 16,047	$ 58,163
Net earnings from discontinued operations	0	0
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	194,690	178,735
Pension and post-retirement	5,141	9,490
Deferred income taxes	5,535	14,919
Amortization of stock-based compensation	4,536	3,966
Loss from non-consolidated affiliates	1,333	2,513
Net gain on financial instruments	(5,301)	(78)
Changes in assets and liabilities:
Accounts receivable	10,546	82,597
Inventory and prepaid supplies	(11,862)	1,052
Accounts payable	15,962	55,834
Unearned revenue	7,337	18,323
Accrued expenses, salaries, wages, benefits and other liabilities	26,113	(15,166)
Pension and post-retirement balances	(4,318)	(4,363)
Other	(2,238)	2,591
NET CASH PROVIDED BY OPERATING ACTIVITIES	263,521	408,576
INVESTING ACTIVITIES:
Expenditures for property and equipment	(172,818)	(412,925)
Proceeds from property and equipment	26,114	10,445
Acquisitions and investments in businesses	(9,800)	(800)
NET CASH (USED IN) INVESTING ACTIVITIES	(156,504)	(403,280)
FINANCING ACTIVITIES:
Principal payments on long term obligations	(471,323)	(90,317)
Proceeds from revolving credit facilities	340,000	140,000
Payments for financing costs	0	(511)
Purchase of common stock	0	(36,874)
Withholding taxes paid for conversion of employee stock awards	(535)	(1,578)
Other financing related proceeds	0	0
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(131,858)	10,720
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(24,841)	16,016
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	53,555	27,134
CASH AND CASH EQUIVALENTS AT END OF PERIOD	28,714	43,150
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid, net of amount capitalized	42,226	20,238
Federal and state income taxes paid	5,558	6,513
Restricted balance of cash	12,957	6,896
SUPPLEMENTAL NON-CASH INFORMATION:
Accrued expenditures for property and equipment	$ 52,884	$ 77,412