CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
Mar. 27, 2021	Mar. 28, 2020
Cash flows relating to operating activities
Net income	$ 63,935	$ 50,837
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	61,508	57,260
Stock-based compensation	13,189	10,960
Debt extinguishment and financing costs	26,907	0
Deferred income taxes	(9,125)	(2,973)
Loss on venture capital and strategic equity investments, net	16,719	12,035
Other, net	496	10,495
Changes in assets and liabilities:
Trade receivables, net	5,598	(32,136)
Inventories	(11,404)	4,076
Accounts payable	9,622	(10,003)
Accrued compensation	(37,360)	(45,245)
Deferred revenue	5,006	6,065
Customer contract deposits	(5,446)	4,454
Other assets and liabilities, net	30,584	2,765
Net cash provided by operating activities	170,229	68,590
Cash flows relating to investing activities
Acquisition of businesses and assets, net of cash acquired	(94,197)	(382,250)
Capital expenditures	(28,030)	(25,721)
Purchases of investments and contributions to venture capital investments	(16,550)	(7,121)
Proceeds from sale of investments	0	2,504
Other, net	781	(1,097)
Net cash used in investing activities	(137,996)	(413,685)
Cash flows relating to financing activities
Proceeds from long-term debt and revolving credit facility	1,954,011	1,409,793
Proceeds from exercises of stock options	19,612	22,608
Payments on long-term debt, revolving credit facility, and finance lease obligations	(1,714,195)	(925,109)
Purchase of treasury stock	(36,028)	(23,675)
Payment of debt extinguishment and financing costs	(28,680)	0
Other, net	0	(4,405)
Net cash provided by financing activities	194,720	479,212
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	10,953	290
Net change in cash, cash equivalents, and restricted cash	237,906	134,407
Cash, cash equivalents, and restricted cash, beginning of period	233,119	240,046
Cash, cash equivalents, and restricted cash, end of period	471,025	374,453
Supplemental cash flow information:
Cash, cash equivalents, and restricted cash, end of period	$ 471,025	$ 374,453

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