Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Operating Activities
Net income	$ 83,591	$ 47,092	$ 61,494
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	15,912	14,766	13,216
Amortization of other intangible assets and other assets	44,102	27,246	27,715
Amortization of debt discount and debt issuance costs	12,892	10,146
Stock-based compensation expense	50,077	44,752	39,628
Income tax shortfall from stock-based awards			(1,671)
Deferred income taxes	(8,210)	(26,452)	(4,087)
Changes in operating assets and liabilities:
Accounts receivable	3,931	3,234	46
Inventories	7,660	(13,416)	(6,093)
Prepaid expenses and other assets	(4,960)	25,266	(3,568)
Accounts payable	5,952	(468)	263
Other current liabilities and income taxes	(21,828)	61,924	2,879
Deferred income, deferred revenue and returns liability	(6,202)	4,453	9,713
Other non-current liabilities	(9,375)	(9,022)	(10,625)
Net cash provided by operating activities	173,542	189,521	128,910
Investing Activities
Purchases of available-for-sale investments	(395,904)	(636,363)	(185,231)
Sales and maturities of available-for-sale investments	474,129	294,452	161,921
Purchases of property and equipment	(24,462)	(12,252)	(10,927)
Purchases of other assets	(11,063)	(4,960)	(8,801)
Acquisitions of businesses, net of cash acquired	(239,729)	(15,168)	(6,546)
Net cash used in investing activities	(197,029)	(374,291)	(49,584)
Financing Activities
Proceeds from issuance of long-term debt, net		389,468
Payments on debt		(72,500)	(5,000)
Repurchases of common stock	(39,276)		(40,543)
Payment of taxes withheld for vested stock awards	(19,483)	(15,753)	(10,561)
Proceeds from the issuance of common stock	13,303	11,815	13,299
Payment of acquisition-related contingent consideration	(3,380)		(9,500)
Net cash provided by (used in) financing activities	(48,836)	313,030	(52,305)
Increase (decrease) in cash and cash equivalents	(72,323)	128,260	27,021
Cash and cash equivalents at beginning of period	269,366	141,106	114,085
Cash and cash equivalents at end of period	197,043	269,366	141,106
Supplemental Disclosure of Cash Flow Information:
Interest paid	6,227	3,859	2,222
Income taxes paid	$ 20,599	$ 8,929	11,185
Supplemental Disclosure of Non-Cash Activity:
Stock issued in business combination			$ 4,181