CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net earnings	$ 51,761	$ 55,593
Adjustments to reconcile net earnings to net cash used for operating activities
Depreciation and amortization	28,142	25,793
Gain on sale/disposal of long-lived assets	(387)	(504)
Deferred income taxes	2,809	1,626
Share-based compensation	3,340	3,495
Inventory Write-down	1,205
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	(1,614)	7,360
Inventories, net	(24,099)	(22,024)
Progress payments	(1,906)	(1,594)
Accounts payable and accrued expenses	(98,179)	(108,873)
Deferred revenue	(23,298)	(11,764)
Income taxes payable	22,783	11,948
Net pension and postretirement liabilities	(149,468)	255
Other current and long-term assets and liabilities	(3,665)	(13,169)
Net cash used for operating activities	(192,576)	(51,858)
Cash flows from investing activities:
Proceeds from sale/disposal of long-lived assets	2,006	1,268
Payments to Acquire Intangible Assets	0	137
Additions to property, plant, and equipment	(18,637)	(17,034)
Purchase Price, Net of Cash Acquired	51,043	49,037
Net cash used for investing activities	(67,674)	(64,940)
Cash flows from financing activities:
Borrowings under revolving credit facility	188,724	3,837
Payment of revolving credit facility	42,297	3,919
Repurchases of common stock	(112,013)	(12,471)
Proceeds from share-based compensation	5,066	4,677
Proceeds from (Payments for) Other Financing Activities	(212)	(197)
Net cash provided by (used for) financing activities	39,268	(8,073)
Effect of exchange-rate changes on cash	(12,294)	3,233
Net decrease in cash and cash equivalents	(233,276)	(121,638)
Cash and cash equivalents at beginning of period	391,033	276,066
Cash and cash equivalents at end of period	157,757	154,428
Supplemental disclosure of non-cash activities:
Capital expenditures incurred but not yet paid	$ 818	$ 264