Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Operating Activities
Net income	$ 19,265	$ 83,591	$ 47,092
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	16,883	15,912	14,766
Amortization of other intangible assets and other assets	39,584	44,102	27,246
Amortization of debt discount and debt issuance costs	13,485	12,892	10,146
Stock-based compensation expense	54,799	50,077	44,752
Deferred income taxes	23,048	(8,210)	(26,452)
Changes in operating assets and liabilities:
Accounts receivable	(2,401)	3,931	3,234
Inventories	2,171	7,660	(13,416)
Prepaid expenses and other assets	8,965	(4,960)	25,266
Accounts payable	7,830	5,952	(468)
Other current liabilities and income taxes	(6,826)	(21,828)	61,924
Deferred income, deferred revenue and returns liability	(3,243)	(6,202)	4,453
Other non-current liabilities	(7,038)	(9,375)	(9,022)
Net cash provided by operating activities	166,522	173,542	189,521
Investing Activities
Purchases of available-for-sale investments	(424,524)	(395,904)	(636,363)
Sales and maturities of available-for-sale investments	344,937	474,129	294,452
Purchases of property and equipment	(16,279)	(24,462)	(12,252)
Purchases of other assets	(8,396)	(11,063)	(4,960)
Acquisitions of businesses, net of cash acquired	(2,510)	(239,729)	(15,168)
Net cash used in investing activities	(106,772)	(197,029)	(374,291)
Financing Activities
Proceeds from issuance of long-term debt			400,000
Payment of debt issuance costs	(1,132)		(10,532)
Payments on debt			(72,500)
Repurchases of common stock	(26,716)	(39,276)
Payment of taxes withheld for vested stock awards	(16,295)	(19,483)	(15,753)
Proceeds from the issuance of common stock	14,496	13,303	11,815
Payment of acquisition-related contingent consideration		(3,380)
Net cash provided by (used in) financing activities	(29,647)	(48,836)	313,030
Increase (decrease) in cash and cash equivalents	30,103	(72,323)	128,260
Cash and cash equivalents at beginning of period	197,043	269,366	141,106
Cash and cash equivalents at end of period	227,146	197,043	269,366
Supplemental Disclosure of Cash Flow Information:
Interest paid	6,367	6,227	3,859
Income taxes paid	$ 10,291	$ 20,599	$ 8,929