Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Cash flows from operating activities:
Net income	$ 16,992	$ 23,471
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,176	6,661
Stock-based compensation	(108)	432
Net (gain) loss on disposals and impairments of assets	(2)	27
Excess tax benefits from stock-based compensation	(19)	(2,401)
Deferred income taxes	(1,450)	585
Changes in operating assets and liabilities, net of effect of acquisition:
Accounts receivable	(552)	2,454
Inventories	(4,438)	5,269
Income taxes	3,795	7,534
Prepaid expenses and other assets	1,030	(889)
Accounts payable	3,600	12,955
Customer prepayments	4,785	2,302
Accrued compensation and benefits	4,080	(9,165)
Other taxes and withholding	36	(1,443)
Warranty liabilities	185	(239)
Other accruals and liabilities	1,754	(2,531)
Net cash provided by operating activities	38,864	45,022
Cash flows from investing activities:
Purchases of property and equipment	(16,660)	(14,309)
Proceeds from maturities of marketable debt securities	10,000	5,898
Investments in marketable debt securities	(13,623)	(12,883)
Increase in restricted cash	500	0
Proceeds from sales of property and equipment	5	3
Acquisition of business	0	(15,500)
Investment in non-marketable equity securities	0	(1,500)
Net cash used in investing activities	(20,778)	(38,291)
Cash flows from financing activities:
Repurchases of common stock	(10,236)	(10,144)
Net decrease in short-term borrowings	(6,094)	(4,370)
Proceeds from issuance of common stock	411	2,282
Excess tax benefits from stock-based compensation	19	2,401
Net cash used in financing activities	(15,900)	(9,831)
Net increase (decrease) in cash and cash equivalents	2,186	(3,100)
Cash and cash equivalents, at beginning of period	58,223	87,915
Cash and cash equivalents, at end of period	$ 60,409	$ 84,815