CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net earnings	$ 120,877	$ 82,779
Adjustments to reconcile net earnings to net cash provided by (used for) operating activities
Depreciation and amortization	57,616	56,568
Gain on sale/disposal of long-lived assets	(590)	(373)
Deferred income taxes	6,293	4,208
Share-based compensation	6,725	7,140
Foreign exchange loss on substantial liquidation of subsidiary	0	9,550
Inventory Write-down	0	9,015
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	(53,787)	31,898
Inventories, net	(15,214)	(40,691)
Progress Payments	(2,680)	(470)
Accounts payable and accrued expenses	(58,217)	(55,806)
Deferred revenue	6,663	(12,622)
Net pension and postretirement liabilities	(4,017)	(149,514)
Other current and long-term assets and liabilities	(15,193)	6,109
Net cash provided by (used for) operating activities	48,476	(52,209)
Cash flows from investing activities:
Proceeds from sale/disposal of long-lived assets	2,982	2,411
Additions to property, plant, and equipment	(17,771)	(29,324)
Acquisition of businesses, net of cash acquired	0	82,003
Payments for Previous Acquisition	5,340	0
Net cash used for investing activities	(20,129)	(108,916)
Cash flows from financing activities:
Borrowings under revolving credit facility	163,507	306,797
Payment of revolving credit facility	(163,507)	(231,797)
Repurchases of common stock	(24,395)	(124,613)
Proceeds from share-based compensation	4,919	5,189
Dividends paid	(6,961)	(7,089)
Proceeds from (Payments for) Other Financing Activities	(462)	(429)
Net cash used for financing activities	(26,899)	(51,942)
Effect of exchange-rate changes on cash	(2,188)	(22,583)
Net decrease in cash and cash equivalents	(740)	(235,650)
Cash and cash equivalents at beginning of period	198,248	391,033
Cash and cash equivalents at end of period	$ 197,508	$ 155,383