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	$ 7,941	$ 2,734
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,160	7,965
Gain on sale of assets	(411)
Provision for losses on inventories	984	2,334
Stock-based compensation expense	2,337	2,269
Provision for doubtful accounts	159	15
Loss on disposal of property and equipment	286	61
Deferred income taxes	(336)	(8)
Increase (decrease) in cash, net of divestiture due to changes in:
Accounts receivable	(3,155)	(1,667)
Inventories	(6,471)	(2,363)
Prepaid expenses and other assets	(2,947)	(564)
Accounts payable	752	(330)
Accrued payroll and related expenses	134	(2,379)
Accrued expenses and other liabilities	3,856	(289)
Other long-term liabilities	(909)	(328)
Net cash provided by operating activities	9,380	7,450
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(4,950)	(3,951)
Restricted cash	(47)	(53)
Proceeds from divestiture of business	5,030
Purchase of marketable securities	(590)	(2,346)
Proceeds from the sale or maturity of marketable securities	395	1,481
Net cash used in investing activities	(162)	(4,869)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt and obligations under capital leases	(12,961)	(11,892)
Proceeds from short-term borrowings	1,016	1,599
Repayment of short-term borrowings	(701)	(876)
Purchase of non-controlling interest	(931)
Proceeds from the issuance of common stock under employee plans	2,789	4,010
Net cash used in financing activities	(10,788)	(7,159)
Impact of foreign exchange rate changes on cash balances	462	(343)
Net decrease in cash and cash equivalents	(1,108)	(4,921)
Cash and cash equivalents at beginning of period	53,710	88,767
Cash and cash equivalents at end of period	52,602	83,846
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	589	1,927
Cash paid during the period for income taxes, net	2,007	799
Property and equipment accrued in accounts payable	$ 450	$ 178