CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net earnings	$ 192,914	$ 147,141
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	77,146	74,815
Gain (Loss) on Disposition of Business	(2,149)
Gain on fixed asset disposals	(531)	(225)
Deferred income taxes	4,942	(1,321)
Share-based compensation	11,846	9,173
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	(79,372)	(38,204)
Inventories, net	(50,463)	(892)
Progress payments	764	325
Accounts payable and accrued expenses	(32,389)	(42,662)
Deferred revenue	11,643	16,772
Income taxes payable	(7,620)	(11,358)
Net pension and postretirement liabilities	(46,320)	4,115
Other current and long-term assets and liabilities	18,564	5,639
Net cash provided by operating activities	98,975	162,307
Cash flows from investing activities:
Proceeds from sales and disposals of long lived assets	5,495	1,790
Proceeds from Divestiture of Businesses	(268)
Payments to Acquire Intangible Assets	(1,500)
Additions to property, plant, and equipment	(30,287)	(34,874)
Acquisition of businesses, net of cash acquired	(210,167)	(232,630)
Payments for (Proceeds from) Previous Acquisition	(460)
Net cash used for investing activities	(237,187)	(259,552)
Cash flows from financing activities:
Borrowings under revolving credit facility	370,595	4,884
Payment of revolving credit facility	(369,721)	(5,144)
Repurchases of common stock	(78,898)	(38,939)
Proceeds from share-based compensation	11,135	11,854
Dividends paid	(13,223)	(11,497)
Proceeds from (Payments for) Other Financing Activities	(557)	(512)
Net cash used for financing activities	(80,669)	(39,354)
Effect of exchange-rate changes on cash	(10,322)	14,942
Net decrease in cash and cash equivalents	(229,203)	(121,657)
Cash and cash equivalents at beginning of period	475,120	553,848
Cash and cash equivalents at end of period	245,917	432,191
Supplemental disclosure of non-cash activities:
Capital expenditures incurred but not yet paid	$ 684	$ 756