Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
Apr. 03, 2020	Mar. 29, 2019
Statement of Cash Flows [Abstract]
Net income	$ 48,612	$ 75,775
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	2,175	1,962
Stock-based compensation	13,982	12,529
Non-cash lease expense	1,174	440
Deferred taxes	10,128	0
Other, net	(888)	1,054
Changes in operating assets and liabilities:
Trade receivables, net	(18,270)	55,101
Inventory	(4,695)	(305)
Prepaid expenses and other assets	(2,863)	(11,165)
Deferred revenue	8,850	(1,313)
Accounts payable and other liabilities	(2,131)	27,515
Net cash provided by operating activities	56,074	161,593
Cash flows from investing activities:
Purchases of property, equipment and other	(2,961)	(2,307)
Purchases of investments	(251,505)	(239,869)
Proceeds from maturities and sales of investments	287,086	134,519
Net cash provided by (used in) investing activities	32,620	(107,657)
Cash flows from financing activities:
Proceeds from issuance of common stock under equity incentive plans	3,938	6,817
Taxes paid related to net share settlement of equity awards	(1,793)	(1,580)
Other, net	0	(11)
Net cash provided by financing activities	2,145	5,226
Net increase in cash, cash equivalents and restricted cash	90,839	59,162
Cash, cash equivalents and restricted cash at beginning of period	268,137	315,875
Cash, cash equivalents and restricted cash at end of period	358,976	375,037
Supplemental cash flow disclosure:
Right-of-use assets obtained in exchange for lease obligations	576	8,170
Unpaid liabilities incurred for purchases of property and equipment	$ 481	$ 141

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