CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating Activities
Net income	$ 144,164	$ 184,648
Adjustments to reconcile net income to cash (used for) provided by operations:
Depreciation and amortization	51,051	33,093
Stock-based compensation expense	11,879	9,673
Loss on disposal of property, plant and equipment	525	378
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable and unbilled accounts receivable	(66,544)	(2,171)
Inventories	(48,406)	(10,893)
Accounts payable	(75,761)	(13,757)
Accrued income taxes	(23,025)	2,913
Accrued liabilities and customer deposits	86,937	3,505
Other assets and liabilities	(94,523)	6,587
Net cash (used for) provided by operating activities	(13,703)	213,976
Investing Activities
Purchase of property, plant and equipment	(38,425)	(19,104)
Proceeds from disposal of property, plant and equipment	471	165
Acquisitions of businesses, net of cash acquired	(114,175)	(21,263)
Release of deposit in escrow	23,548	0
Net cash used for investing activities	(128,581)	(40,202)
Financing Activities
Proceeds from debt	745,035	230,000
Payments of debt	(680,145)	(175,499)
Purchase of treasury stock	0	(133,738)
Proceeds from exercise of stock options and other benefit plans	2,679	651
Payment of income tax withholding on share-based compensation	(6,802)	(9,006)
Cash dividends ($0.XX and $0.16 per share for the six months ended June 30, 2017 and 2016, respectively)	(19,177)	(14,565)
Net cash provided by (used for) financing activities	41,590	(102,157)
Effect of changes in currency exchange rates	30,732	5,127
(Decrease) Increase in cash	(69,962)	76,744
Cash, beginning of period	398,484	226,191
Cash, end of period	$ 328,522	$ 302,935