Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 16,938	$ 5,339
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,312	15,682
Gain on sale of assets	(411)
Provision for losses on inventories	2,439	3,775
Stock-based compensation expense	5,447	4,145
Provision for doubtful accounts	264	166
Loss on disposal of property and equipment	287	432
Deferred income taxes	(577)	(101)
Excess tax benefits from stock-based compensation	(2,625)
Increase (decrease) in cash, net of divestiture, due to changes in:
Accounts receivable	(3,985)	1,636
Inventories	(13,277)	(3,568)
Prepaid expenses and other assets	(2,602)	(3,896)
Accounts payable	6,204	1,048
Accrued payroll and related expenses	8,241	342
Accrued expenses and other liabilities	3,946	4,290
Other long-term liabilities	(999)	(5)
Net cash provided by operating activities	33,602	29,285
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(11,895)	(8,340)
Restricted cash	582	(139)
Proceeds from divestiture of business	5,030
Purchase of marketable securities	(661)	(2,400)
Proceeds from the sale or maturity of marketable securities	392	2,245
Net cash used in investing activities	(6,552)	(8,634)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt and obligations under capital leases	(15,496)	(19,422)
Proceeds from short-term borrowings	5,430	1,683
Repayment of short-term borrowings	(3,613)	(3,495)
Purchase of non-controlling interests	(1,863)
Proceeds from the issuance of common stock under employee plans	2,642	4,266
Tax withholding payment related to net share settlement of equity awards	(2,922)	(1,993)
Excess tax benefits from stock-based compensation	2,625
Net cash used in financing activities	(13,197)	(18,961)
Impact of foreign exchange rate changes on cash balances	333	(271)
Net increase in cash and cash equivalents	14,186	1,419
Cash and cash equivalents at beginning of period	53,710	88,767
Cash and cash equivalents at end of period	67,896	90,186
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	1,032	3,354
Cash paid during the period for income taxes, net	3,935	2,113
Property and equipment accrued in accounts payable	$ 708	$ 714