Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015
Cash flows from operating activities:
Net income	$ 40,130	$ 71,691
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	42,555	33,694
Stock-based compensation	9,272	8,952
Net loss on disposals and impairments of assets	9	202
Excess tax benefits from stock-based compensation	(516)	(1,991)
Deferred income taxes	(673)	(5,633)
Gain on sale of non-marketable equity securities	0	(6,891)
Changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	5,271	(6,543)
Inventories	15,991	(24,120)
Income taxes	30,386	13,433
Prepaid expenses and other assets	(3,458)	4,756
Accounts payable	(1,043)	24,623
Customer prepayments	(23,125)	(3,351)
Accrued compensation and benefits	12,441	(97)
Other taxes and withholding	7,494	3,569
Other accruals and liabilities	10,527	19,293
Net Cash Provided by (Used in) Operating Activities	145,261	131,587
Cash flows from investing activities:
Purchases of property and equipment	(38,769)	(61,435)
Proceeds from marketable debt securities	15,090	101,087
Investments in marketable debt securities	(5,968)	(29,299)
Proceeds from sales of property and equipment	67	41
Proceeds from non-marketable equity securities	0	(12,891)
Acquisition of business	0	70,018
Net cash used in investing activities	(29,580)	(46,733)
Repurchases of common stock
Repurchases of common stock	(96,410)	(70,300)
Net increase in short-term borrowings	3,062	2,119
Proceeds from issuance of common stock	1,949	2,658
Excess tax benefits from stock-based compensation	516	1,991
Debt issuance costs	(409)	(639)
Net cash used in financing activities	(91,292)	(64,171)
Cash and cash equivalents, at beginning of period	24,389	20,683
Cash and cash equivalents, at beginning of period	20,994	51,995
Cash and cash equivalents, at end of period	$ 45,383	$ 72,678