Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows — Operating activities:
Net earnings, including noncontrolling interests	$ 136,182	$ 140,875	$ 246,940
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Depreciation	85,175	86,175	92,042
Amortization of intangible and other assets	14,647	14,578	13,862
Loss on extinguishment of debt	46,176	1,201	0
Stock-based compensation	29,478	27,252	23,882
Foreign currency, asset write downs and other non-cash adjustments	29,772	4,277	(11,724)
Change in assets and liabilities:
Accounts receivable, net	(8,675)	45,648	2,883
Inventories, net	(32,124)	15,306	(31,058)
Contract assets, net	74,333	4,258	(45,220)
Prepaid expenses and other assets, net	1,302	34,262	(9,455)
Accounts payable	(19,505)	(22,571)	24,678
Contract liabilities	14,196	(34,066)	19,699
Accrued liabilities and income taxes payable	(13,948)	50,203	12,418
Retirement obligations and other	(15,690)	3,636	(3,357)
Net deferred taxes	(91,200)	(60,497)	(11,493)
Net cash flows provided (used) by operating activities	250,119	310,537	324,097
Cash flows — Investing activities:
Capital expenditures	(54,936)	(57,405)	(75,716)
Proceeds from disposal of assets	2,663	15,705	42,333
Affiliate investment activity	(7,204)	0	0
Net cash flows provided (used) by investing activities	(59,477)	(41,700)	(33,383)
Cash flows — Financing activities:
Payments on senior notes	(1,243,548)	(191,258)	0
Proceeds from issuance of senior notes	498,280	498,280	0
Payments on long-term debt	(7,500)	0	(105,000)
Proceeds from issuance of long-term debt	300,000	0	0
Payments of deferred loan costs	(6,739)	(4,572)	0
Proceeds from short-term financing	0	0	75,000
Payments on short-term financing	0	0	(75,000)
Proceeds under other financing arrangements	1,408	2,285	3,404
Payments under other financing arrangements	(7,213)	(9,792)	(9,856)
Payments related to tax withholding for stock-based compensation	(5,984)	(4,607)	(3,900)
Repurchases of common shares	(17,531)	(32,112)	(15,000)
Payments of dividends	(104,604)	(104,159)	(99,557)
Other	(6,276)	(6,478)	(1,555)
Net cash flows provided (used) by financing activities	(599,707)	147,587	(231,464)
Effect of exchange rate changes on cash	(27,757)	7,870	(7,953)
Net change in cash and cash equivalents	(436,822)	424,294	51,297
Cash and cash equivalents at beginning of year	1,095,274	670,980	619,683
Cash and cash equivalents at end of year	658,452	1,095,274	670,980
Income taxes paid (net of refunds)	65,621	75,342	66,372
Interest paid	$ 72,247	$ 57,041	$ 53,607