Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016
Operating Activities
Net Income	$ 31,995	$ 21,367
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation of property and equipment	7,308	6,675
Amortization of other intangible assets and other assets	13,571	15,534
Amortization of debt discount and debt issuance costs	3,907
Stock-based compensation expense	21,652	20,861
Income tax shortfall from stock-based awards		(1,218)
Deferred income taxes	(6,242)	817
Changes in operating assets and liabilities:
Accounts receivable	(887)	1,611
Inventories	(7,737)	(2,888)
Prepaid expenses and other assets	12,539	3,282
Accounts payable	2,363	(1,680)
Accrued expenses	141	4,372
Deferred income on shipments to distributors	3,251	3,773
Income taxes	(127)	(1,338)
Other non-current liabilities	(1,169)	(10,737)
Net cash provided by operating activities	80,565	60,431
Investing Activities
Purchases of available-for-sale investments	(389,234)	(92,222)
Sales and maturities of available-for-sale investments	92,307	78,950
Purchases of property and equipment	(8,390)	(5,146)
Purchases of other assets	(1,784)	(2,215)
Acquisition of business, net of cash acquired	(13,658)
Net cash used in investing activities	(320,759)	(20,633)
Financing Activities
Proceeds from issuance of long-term debt, net	389,468
Payments on debt	(72,500)	(5,000)
Repurchases of common stock		(36,103)
Payment of taxes withheld for vested stock awards	(14,101)	(9,308)
Proceeds from the issuance of common stock	6,836	7,362
Payment of acquisition-related contingent consideration		(9,500)
Net cash provided by (used in) financing activities	309,703	(52,549)
Increase (decrease) in cash and cash equivalents	69,509	(12,751)
Cash and cash equivalents at beginning of period	141,106	114,085
Cash and cash equivalents at end of period	$ 210,615	$ 101,334