CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities
Net income	$ 98,841	$ 170,728
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	165,064	53,227
Stock-based compensation expense	23,932	13,983
Below market intangible amortization	(9,400)	0
Loss on disposal of property, plant and equipment	461	1,353
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable and unbilled accounts receivable	(35,705)	(59,979)
Inventories	147,424	(116,131)
Accounts payable	(71,935)	59,411
Accrued income taxes	21,399	(202)
Accrued liabilities and customer deposits	24,188	27,545
Other assets and liabilities	79,655	(82,031)
Net cash provided by operating activities	443,924	67,904
Investing Activities
Purchase of property, plant and equipment	(61,867)	(39,723)
Proceeds from disposal of property, plant and equipment	3,055	8,900
Acquisitions of businesses, net of cash acquired	(2,981,552)	(38,277)
Net cash used for investing activities	(3,040,364)	(69,100)
Financing Activities
Proceeds from debt	2,325,934	591,890
Payments of debt	(1,552,121)	(546,394)
Proceeds from exercise of stock options and other benefit plans	775	6,867
Payment of income tax withholding on share-based compensation	(4,117)	(6,503)
Payment of contingent consideration on acquisitions	(10,100)	0
Cash dividends	(34,263)	(23,096)
Net cash provided by financing activities	726,108	22,764
Effect of changes in currency exchange rates	(10,651)	(9,395)
(Decrease) increase in cash	(1,880,983)	12,173
Cash, cash equivalents and restricted cash beginning of period	2,342,354	233,401
Cash and cash equivalents end of period	$ 461,371	$ 245,574