CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net earnings	$ 118,431	$ 83,197
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	51,257	49,961
Gain (Loss) on Disposition of Business	(2,149)
Gain on fixed asset disposals	(897)	(197)
Deferred income taxes	5,554	(1,750)
Share-based compensation	7,801	6,016
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	(57,522)	(27,246)
Inventories, net	(43,625)	534
Progress payments	6,718	(1,316)
Accounts payable and accrued expenses	(38,621)	(48,229)
Deferred revenue	17,865	11,171
Income taxes payable	(7,712)	(13,217)
Net pension and postretirement liabilities	(48,265)	1,041
Other current and long-term assets and liabilities	17,850	967
Net cash provided by operating activities	26,685	60,932
Cash flows from investing activities:
Proceeds from sales and disposals of long lived assets	4,328	349
Proceeds from Divestiture of Businesses	(268)
Payments to Acquire Intangible Assets	(1,500)
Additions to property, plant, and equipment	(19,852)	(23,288)
Acquisition of businesses, net of cash acquired	(212,737)	(232,630)
Payments for (Proceeds from) Previous Acquisition	(460)
Net cash used for investing activities	(230,489)	(255,569)
Cash flows from financing activities:
Borrowings under revolving credit facility	367,762	2,736
Payment of revolving credit facility	(366,953)	(2,584)
Repurchases of common stock	(46,115)	(26,454)
Proceeds from share-based compensation	6,360	5,374
Dividends paid	(6,623)	(5,757)
Proceeds from (Payments for) Other Financing Activities	(365)	(336)
Net cash used for financing activities	(45,934)	(27,021)
Effect of exchange-rate changes on cash	(6,484)	10,521
Net decrease in cash and cash equivalents	(256,222)	(211,137)
Cash and cash equivalents at beginning of period	475,120	553,848
Cash and cash equivalents at end of period	218,898	342,711
Supplemental disclosure of non-cash activities:
Capital expenditures incurred but not yet paid	$ 425	$ 1,641