Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of period	$ 616,686	$ 932,161
Cash flows from operating activities:
Net income	164,609	172,043
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	89,726	88,006
Amortization of debt discount and fees	792	9,185
Stock-based compensation	79,986	67,681
Gain on investments, net	(4,070)	(1,434)
Gain on sale of property, plant and equipment	(482)	0
Deferred income taxes	8,657	1,713
Other non-cash items	1,869	(69)
Changes in operating assets and liabilities, net of effect of acquired businesses:
Receivables	2,873	(10,100)
Inventories	(16,339)	(1,861)
Prepaid expenses and other	(12,135)	(12,451)
Other assets	(3,822)	300
Accounts payable and accrued liabilities	(46,585)	(28,154)
Deferred revenue	(10,823)	(9,207)
Other long-term liabilities	(6,239)	(20,303)
Net cash provided by operating activities	248,017	255,349
Cash flows from investing activities:
Purchases of available-for-sale securities	(20,525)	(81,300)
Proceeds from the sale of available-for-sale securities	55,418	50,806
Proceeds from the maturity of available-for-sale securities	52,362	25,550
Proceeds from the sale of long-term investments	2,913	4,510
Proceeds from the sale of property, plant and equipment	482	0
Purchases of property, plant and equipment	(42,452)	(34,093)
Cash paid in business combinations and asset acquisitions, net of cash acquired	(41,627)	0
Net cash provided by (used for) investing activities	6,571	(34,527)
Cash flows from financing activities:
Proceeds from term loans	300,000	0
Proceeds from revolving credit facility	50,000	0
Payment of debt issuance costs	(622)	0
Payment of convertible notes	0	(349,999)
Payment of convertible notes embedded conversion derivative liability	0	(530,643)
Proceeds from convertible notes hedges	0	530,643
Excess tax benefits from stock-based compensation	0	16,940
Proceeds from issuance of common stock	50,293	59,448
Stock received for payment of employee taxes on vesting of restricted stock	(35,532)	(31,795)
Payments for repurchases of common stock	(720,196)	(213,135)
Net cash used for financing activities	(356,057)	(518,541)
Effect of exchange rate changes on cash and cash equivalents	9,116	(18,351)
Decrease in cash and cash equivalents	(92,353)	(316,070)
Cash and cash equivalents at end of period	524,333	616,091
Supplemental cash flow information:
Cash paid for interest	11,238	12,134
Cash paid for taxes, net	$ 27,332	$ 23,930