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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 253,396	$ 267,628
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	19,255	18,971
Deferred income taxes	1,632	(2,992)
Depreciation	28,704	30,585
Amortization of intangibles	24,911	25,251
Change in operating assets and liabilities:
Decrease in accounts receivable	52,508	36,591
Increase in inventories	(62,200)	(33,877)
Increase in other current assets	(11,627)	(15,264)
Increase in other assets	(15,060)	(2,857)
Decrease in accounts payable and other current liabilities	(10,439)	(77,848)
Increase in deferred revenue and customer advances	54,672	40,134
Effect of the 2017 Tax & Jobs Act	(3,229)	12,450
Decrease in other liabilities	(29,720)	(22,215)
Net cash provided by operating activities	302,803	276,557
Cash flows from investing activities:
Additions to property, plant, equipment and software capitalization	(65,188)	(36,831)
Investment in unaffiliated companies	(4,750)	(3,215)
Purchases of investments	(35,523)	(513,342)
Maturities and sales of investments	890,524	1,759,770
Net cash provided by investing activities	785,063	1,206,382
Cash flows from financing activities:
Proceeds from debt issuances	363	226
Payments on debt	(245)	(850,000)
Proceeds from stock plans	30,129	34,845
Purchases of treasury shares	(1,329,635)	(553,144)
Proceeds from (payments for) derivative contracts	4,654	(2,158)
Net cash used in financing activities	(1,294,734)	(1,370,231)
Effect of exchange rate changes on cash and cash equivalents	(1,414)	(12,823)
(Decrease) increase in cash and cash equivalents	(208,282)	99,885
Cash and cash equivalents at beginning of period	796,280	642,319
Cash and cash equivalents at end of period	$ 587,998	$ 742,204

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