CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net earnings	$ 43,643	$ 32,547
Adjustments to reconcile net earnings to net cash provided by (used for) operating activities:
Depreciation and amortization	24,601	24,926
Gain (Loss) on Disposition of Other Assets	2,108	0
Gain on fixed asset disposals	(697)	(38)
Deferred income taxes	7,806	(877)
Share-based compensation	4,591	3,364
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	(2,451)	(7,373)
Inventories, net	(28,652)	(3,688)
Progress payments	(3,121)	(797)
Accounts payable and accrued expenses	(79,564)	(75,676)
Deferred revenue	6,410	3,743
Income taxes payable	1,407	(2,249)
Net pension and postretirement liabilities	(48,704)	(2,019)
Other current and long-term assets and liabilities	5,577	3,196
Net cash used for operating activities	(71,262)	(24,941)
Cash flows from investing activities:
Proceeds from sales and disposals of long lived assets	819	85
Payments to Acquire Intangible Assets	(1,500)	0
Additions to property, plant, and equipment	(8,971)	(10,374)
Payments to Acquire Businesses, Net of Cash Acquired	0	(239,372)
Net cash used for investing activities	(9,652)	(249,661)
Cash flows from financing activities:
Borrowings under revolving credit facility	3,716	120
Repayments of Lines of Credit	(2,884)	(209)
Repurchases of common stock	(12,328)	(12,885)
Proceeds from share-based compensation	6,151	5,195
Proceeds from (Payments for) Other Financing Activities	(181)	(224)
Net cash used for financing activities	(5,526)	(8,003)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Effect of exchange-rate changes on cash	7,838	1,663
Net decrease in cash and cash equivalents	(78,602)	(280,942)
Cash and cash equivalents at beginning of period	475,120	553,848
Cash and cash equivalents at end of period	396,518	272,906
Supplemental disclosure of non-cash activities:
Capital expenditures incurred but not yet paid	$ 182	$ 1,370