Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019
Operating Activities
Net income (loss)	$ 421	$ (10,631)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation of property and equipment	8,428	8,447
Amortization of other intangible assets and other assets	21,568	20,476
Amortization of debt discount and debt issuance costs	8,359	6,659
Loss on extinguishment of convertible debt	3,685
Stock-based compensation expense	29,770	26,253
Deferred income taxes	1,177	24,043
Changes in operating assets and liabilities:
Accounts receivable	7,070	893
Inventories	6,767	1,118
Prepaid expenses and other assets	21,821	11,326
Accounts payable	(769)	5,321
Other current liabilities and income taxes	(15,442)	(18,101)
Deferred revenue and returns liability	6,678	(1,228)
Other non-current liabilities	970	(3,222)
Net cash provided by operating activities	100,503	71,354
Investing Activities
Purchases of available-for-sale investments	(199,347)	(184,170)
Sales and maturities of available-for-sale investments	255,112	151,428
Purchases of property and equipment	(10,394)	(9,402)
Purchases of other assets	(820)	(2,588)
Acquisitions of businesses, net of cash acquired	(316,809)
Net cash used in investing activities	(272,258)	(44,732)
Financing Activities
Proceeds from issuance of debt	845,000
Payments on debt	(597,446)
Repurchases of common stock	(16,287)	(26,716)
Payment of taxes withheld for vested stock awards	(16,756)	(14,509)
Proceeds from the issuance of common stock	7,757	7,109
Net cash provided by (used in) financing activities	222,268	(34,116)
Increase (decrease) in cash and cash equivalents	50,513	(7,494)
Cash and cash equivalents at beginning of period	227,146	197,043
Cash and cash equivalents at end of period	$ 277,659	$ 189,549