Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 28, 2013	Jun. 29, 2012
Cash flows from operating activities:
Consolidated net income	$ 1,265	$ 6,280
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,394	7,226
Share-based compensation	2,868	2,323
Deferred income taxes	948	(18)
Earnings from equity investment	(655)	(220)
Loss on disposal of business	311
Non-cash interest expense	497	536
Non-cash restructuring charges (benefits)	(81)	2,545
Other non-cash items	983	109
Changes in operating assets and liabilities:
Accounts receivable	(4,214)	(2,824)
Inventories	2,514	(2,653)
Prepaid expenses, income taxes receivable and other current assets	1,038	1,470
Deferred revenue	(880)	(3,621)
Accounts payable, accrued expenses, income taxes payable and other current liabilities	1,890	7,287
Other non-current assets and liabilities	812	411
Cash provided by operating activities	17,690	18,851
Cash flows from investing activities:
Purchases of property, plant and equipment	(2,341)	(2,625)
Acquisition of business	(82,653)
Proceeds from the sale of property, plant and equipment	4,560	205
Proceeds from sale of business, net of transaction costs of $990	7,010
Cash used in investing activities	(73,424)	(2,420)
Cash flows from financing activities:
Proceeds from issuance of debt	60,000
Repayments of long-term debt	(3,750)	(5,000)
Repayments of borrowings under the revolving credit facility	(11,000)	(10,000)
Payments for debt issuance costs	(145)
Payments of withholding taxes from stock-based awards	(739)	(29)
Capital lease payments	(608)	(412)
Cash provided by (used in) financing activities	43,758	(15,441)
Effect of exchange rates on cash and cash equivalents	(1,754)	(67)
Increase (decrease) in cash and cash equivalents	(13,730)	923
Cash and cash equivalents, beginning of period	65,788	54,835
Cash and cash equivalents, end of period	52,058	55,758
Supplemental disclosure of cash flow information:
Cash paid for interest	1,071	1,016
Cash paid for income taxes	1,095	445
Income tax refunds received	$ 3	$ 222