CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net earnings	$ 147,141	$ 118,714
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	74,815	72,419
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	(1,011)	(845)
Gain on fixed asset disposals	(225)	(194)
Deferred income taxes	(1,321)	(6,388)
Share-based compensation	9,173	7,813
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	(38,204)	95,200
Inventories, net	(892)	(18,613)
Progress payments	325	4,094
Accounts payable and accrued expenses	(42,662)	(58,162)
Deferred revenue	16,772	14,937
Income taxes payable	(11,358)	8,936
Net pension and postretirement liabilities	4,115	2,723
Other Operating Activities, Cash Flow Statement	0	20,405
Other current and long-term assets and liabilities	5,639	6,173
Net cash provided by operating activities	162,307	267,212
Cash flows from investing activities:
Proceeds from sales and disposals of long lived assets	1,790	1,204
Proceeds from Divestiture of Businesses	6,162	1,027
Additions to property, plant, and equipment	(34,874)	(26,127)
Purchase Price, Net of Cash Acquired	232,630	295
Net cash used for investing activities	(259,552)	(24,191)
Cash flows from financing activities:
Borrowings under revolving credit facility	4,884	7,504
Payments of revolving credit facility	(5,144)	(7,961)
Repurchases of common stock	(38,939)	(80,296)
Proceeds from share-based compensation	11,854	18,359
Dividends paid	(11,497)	(11,576)
Excess tax benefits from share-based compensation plans	0	6,771
Proceeds from (Payments for) Other Financing Activities	(512)	(469)
Net cash used for financing activities	(39,354)	(67,668)
Effect of exchange-rate changes on cash	14,942	(11,997)
Net increase (decrease) in cash and cash equivalents	(121,657)	163,356
Cash and cash equivalents at beginning of period	553,848	288,697
Cash and cash equivalents at end of period	432,191	452,053
Supplemental disclosure of non-cash activities:
Capital expenditures incurred but not yet paid	$ 756	$ 688