CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net earnings (loss)	$ 222,905	$ 122,761	$ (246,771)
Adjustments to reconcile net earnings (loss) to net cash provided by operations:
Depreciation and amortization	211,156	201,443	213,718
Provision (credit) for doubtful accounts	402	1,183	(138)
Provision (benefit) for deferred income taxes	65,298	37,782	(44,419)
Gain on disposition of assets	(5,009)	(8,279)	(5,761)
Impairments and other charges	0	0	340,713
Amortization of share-based compensation	14,941	13,865	15,713
Amortization of major maintenance costs	28,966	29,031	33,213
Other	(3,338)	(283)	(640)
Increase (decrease) in cash flows resulting from changes in:
Accounts receivable	(50,135)	(31,550)	29,126
Inventory	7,694	(127,095)	(19,248)
Other assets	(37,688)	(27,801)	(38,335)
Income taxes payable	71,604	1,975	480
Accounts payable	(18,271)	75,996	15,951
Accrued and other liabilities	31,703	5,100	27,974
Net cash provided by operating activities	540,228	294,128	321,576
Cash flows from investing activities:
Capital expenditures	(401,730)	(172,606)	(98,015)
Acquisitions of businesses and marine equipment, net of cash acquired	(37,500)	(3,900)	(9,115)
Proceeds from disposition of assets and other	26,081	36,905	51,342
Net cash used in investing activities	(413,149)	(139,601)	(55,788)
Cash flows from financing activities:
Borrowings (payments) on bank credit facilities, net	48,776	1,358	(248,105)
Borrowings on long-term debt	240,000	310,000	0
Payments on long-term debt	(350,000)	(395,000)	(60,000)
Payment of debt issue costs	(1,254)	(1,977)	0
Proceeds from exercise of stock options	4,209	3,887	629
Payments related to tax withholding for share-based compensation	(3,908)	(3,408)	(2,856)
Treasury stock purchases	(112,803)	(22,901)	0
Return of investment to noncontrolling interests and other	(99)	(722)	(981)
Net cash used in financing activities	(175,079)	(108,763)	(311,313)
Increase (decrease) in cash and cash equivalents	(48,000)	45,764	(45,525)
Cash and cash equivalents, beginning of year	80,577	34,813	80,338
Cash and cash equivalents, end of year	32,577	80,577	34,813
Cash paid (received) during the period:
Interest paid	49,317	42,816	40,878
Income taxes paid (refunded), net	(65,787)	2,553	(116,648)
Operating cash outflow from operating leases	43,954	44,229	44,089
Non-cash investing activity:
Capital expenditures included in accounts payable	9,567	2,996	18,633
Right-of-use assets obtained in exchange for lease obligations	$ 39,153	$ 22,799	$ 33,842