Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 616,686	$ 932,161	$ 536,260
Cash flows from operating activities:
Net income	203,086	252,417	158,898
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	119,588	118,165	115,634
Amortization of debt discount and fees	1,069	9,402	20,529
Stock-based compensation	109,217	92,341	83,792
Gain on investments, net	(4,725)	(2,124)	(4,707)
Gain on sale of property, plant and equipment	(923)	0	0
Deferred income taxes	(4,869)	(13,148)	12,478
Other non-cash items	4,027	646	6,854
Changes in operating assets and liabilities, net of effect of acquired businesses:
Receivables	(3,299)	(44,732)	(17,925)
Inventories	4,934	(1,120)	(11,708)
Prepaid expenses and other	(6,903)	(1,380)	(2,501)
Other assets	(6,566)	(1,558)	(42,181)
Accounts payable and accrued liabilities	2,655	15,321	3,856
Deferred revenue	30,742	(27,019)	(11,860)
Other long-term liabilities	(3,154)	(19,011)	5,563
Net cash provided by operating activities	444,879	378,200	316,722
Cash flows from investing activities:
Purchases of available-for-sale securities	(20,525)	(96,531)	(124,165)
Proceeds from the sale of available-for-sale securities	55,619	60,949	85,384
Proceeds from the maturity of available-for-sale securities	57,762	31,316	46,612
Proceeds from the sale of long-term investments	2,917	4,570	1,085
Proceeds from the sale of property, plant and equipment	923	0	0
Purchases of property, plant and equipment	(53,712)	(44,808)	(39,810)
Cash paid in business combinations and asset acquisitions, net of cash acquired	(41,627)	0	(167,121)
Net cash provided by (used for) investing activities	1,357	(44,504)	(198,015)
Cash flows from financing activities:
Proceeds from issuance of debt	300,000	0	348,649
Proceeds from revolving credit facility	115,000	0	100,000
Payment on revolving credit facility	(65,000)	0	(100,000)
Payment of convertible notes	0	(349,999)	(1)
Payment of convertible notes embedded conversion derivative liability	0	(530,643)	(1)
Proceeds from convertible notes hedges	0	530,643	1
Payment of debt issuance costs	(622)	0	(6,500)
Payment of acquisition-related contingent consideration	0	0	(1,835)
Excess tax benefits from stock-based compensation	0	15,591	7,583
Proceeds from issuance of common stock	55,440	74,938	65,913
Stock received for payment of employee taxes on vesting of restricted stock	(37,226)	(33,651)	(24,727)
Payments for repurchases of common stock	(960,289)	(333,189)	(100,117)
Net cash provided by (used for) financing activities	(592,697)	(626,310)	288,965
Effect of exchange rate changes on cash and cash equivalents	(4,993)	(22,861)	(11,771)
Increase (decrease) in cash and cash equivalents	(151,454)	(315,475)	395,901
Cash and cash equivalents at end of year	465,232	616,686	932,161
Supplemental cash flow information:
Cash paid for interest	21,024	19,918	9,963
Cash paid for income taxes, net	36,823	29,494	26,453
Non-cash investing and financing activities:
Available-for-sale securities received from customer	$ 0	$ 0	$ 1,695