CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net earnings	$ 160,943	$ 85,436
Adjustments to reconcile net earnings to net cash provided by operations:
Depreciation and amortization	156,251	150,498
Provision for deferred income taxes	46,441	25,986
Amortization of share-based compensation	12,310	11,448
Amortization of major maintenance costs	21,050	21,677
Other	(8,001)	(7,608)
Decrease in cash flows resulting from changes in operating assets and liabilities, net	(64,767)	(126,252)
Net cash provided by operating activities	324,227	161,185
Cash flows from investing activities:
Capital expenditures	(274,963)	(120,263)
Acquisitions of businesses and marine equipment	(37,500)	(3,900)
Proceeds from disposition of assets	21,846	32,904
Net cash used in investing activities	(290,617)	(91,259)
Cash flows from financing activities:
Borrowings on bank credit facilities, net	100,316	21,664
Borrowings on long-term debt	240,000	250,000
Payments on long-term debt	(350,000)	(315,000)
Payment of debt issuance costs	(1,237)	(1,538)
Proceeds from exercise of stock options	3,431	3,885
Payments related to tax withholding for share-based compensation	(3,598)	(3,193)
Treasury stock purchases	(60,910)	(22,901)
Return of investment to noncontrolling interest and other	(73)	(665)
Net cash used in financing activities	(72,071)	(67,748)
Increase(decrease) in cash and cash equivalents	(38,461)	2,178
Cash and cash equivalents, beginning of year	80,577	34,813
Cash and cash equivalents, end of period	42,116	36,991
Cash paid(received) during the period:
Interest paid	45,276	39,754
Income taxes paid(refunded) net	(67,118)	2,097
Operating cash outflow from operating leases	33,266	33,412
Non-cash investing activity:
Capital expenditures included in accounts payable	(2,305)	(8,508)
Right-of-use assets obtained in exchange for lease obligations	$ 32,652	$ 14,329