CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net earnings	$ 83,197	$ 72,782
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	49,961	48,987
Gain on fixed asset disposals	(197)	(28)
Deferred income taxes	(1,750)	14,127
Share-based compensation	6,016	4,985
Change in operating assets and liabilities, net of businesses acquired and divested:
Accounts receivable, net	(27,246)	85,281
Inventories, net	534	(14,527)
Progress payments	(1,316)	(345)
Accounts payable and accrued expenses	(48,229)	(65,856)
Deferred revenue	11,171	9,153
Income taxes payable	(13,217)	(25,412)
Net pension and postretirement liabilities	1,041	412
Other Operating Activities, Cash Flow Statement	0	20,405
Other current and long-term assets and liabilities	967	6,667
Net cash provided by operating activities	60,932	156,631
Cash flows from investing activities:
Proceeds from sales and disposals of long lived assets	349	244
Additions to property, plant, and equipment	(23,288)	(15,733)
Acquisition of businesses, net of cash acquired	(232,630)	(295)
Net cash used for investing activities	(255,569)	(15,784)
Cash flows from financing activities:
Borrowings under revolving credit facility	2,736	3,755
Payment of revolving credit facility	(2,584)	(3,901)
Repurchases of common stock	(26,454)	(54,958)
Proceeds from share-based compensation	5,374	13,098
Dividends paid	(5,757)	(5,797)
Excess tax benefits from share-based compensation plans	0	6,220
Proceeds from (Payments for) Other Financing Activities	(336)	(308)
Net cash used for financing activities	(27,021)	(41,891)
Effect of exchange-rate changes on cash	10,521	(4,502)
Net increase (decrease) in cash and cash equivalents	(211,137)	94,454
Cash and cash equivalents at beginning of period	553,848	288,697
Cash and cash equivalents at end of period	342,711	383,151
Supplemental disclosure of non-cash activities:
Capital expenditures incurred but not yet paid	$ 1,641	$ 775