CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net earnings	$ 55,593	$ 43,643
Adjustments to reconcile net earnings to net cash provided by (used for) operating activities:
Depreciation and amortization	25,793	24,601
Gain (Loss) on Disposition of Other Assets	0	2,108
Gain on fixed asset disposals	(504)	(697)
Deferred income taxes	1,626	7,806
Share-based compensation	3,495	4,591
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	7,360	(2,451)
Inventories, net	(22,024)	(28,652)
Progress payments	(1,594)	(3,121)
Accounts payable and accrued expenses	(108,873)	(79,564)
Deferred revenue	(11,764)	6,410
Income taxes payable	11,948	1,407
Net pension and postretirement liabilities	255	(48,704)
Other current and long-term assets and liabilities	(13,169)	5,577
Net cash used for operating activities	(51,858)	(71,262)
Cash flows from investing activities:
Proceeds from sales and disposals of long lived assets	1,268	819
Additions to property, plant, and equipment	(17,034)	(8,971)
Payments to Acquire Intangible Assets	(137)	(1,500)
Payments to Acquire Businesses, Net of Cash Acquired	(49,037)	0
Net cash used for investing activities	(64,940)	(9,652)
Cash flows from financing activities:
Borrowings under revolving credit facility	3,837	3,716
Repayments of Lines of Credit	(3,919)	(2,884)
Repurchases of common stock	(12,471)	(12,328)
Proceeds from share-based compensation	4,677	6,151
Proceeds from (Payments for) Other Financing Activities	(197)	(181)
Net cash used for financing activities	(8,073)	(5,526)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Effect of exchange-rate changes on cash	3,233	7,838
Net decrease in cash and cash equivalents	(121,638)	(78,602)
Cash and cash equivalents at beginning of period	276,066	475,120
Cash and cash equivalents at end of period	154,428	396,518
Supplemental disclosure of non-cash activities:
Capital expenditures incurred but not yet paid	$ 264	$ 182