Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011
Cash flows from operating activities:
Consolidated net income	$ 3,765	$ 25,153
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,429	11,463
Share-based compensation	3,479	2,518
Deferred income taxes	(657)	59
Earnings from equity investment	(364)	(1,302)
Non-cash interest expense	796	540
Non-cash restructuring charges	3,599	48
Other non-cash items	91	685
Changes in operating assets and liabilities:
Accounts receivable	(5,766)	(1,453)
Inventories	(62)	(4,021)
Prepaid expenses, income taxes receivable and other current assets	1,935	5,958
Deferred revenue	(2,975)	(11,055)
Accounts payable, accrued expenses and income taxes payable	6,183	4,017
Other non-current assets and liabilities	1,046	(1,888)
Cash provided by operating activities	21,499	30,722
Cash flows from investing activities:
Purchases of property, plant and equipment	(3,734)	(2,607)
Proceeds from the sale of property, plant and equipment	283
Cash used in investing activities	(3,451)	(2,607)
Cash flows from financing activities:
Payments for debt issuance cost	(92)
Payments of withholding taxes from stock-based awards	(100)
Capital lease payments	(596)
Repayments of long-term debt	(7,500)	(35,000)
Repayments of borrowings under the revolving credit facility	(13,000)
Cash used in financing activities	(21,288)	(35,000)
Effect of exchange rates on cash and cash equivalents	1,268	759
Decrease in cash and cash equivalents	(1,972)	(6,126)
Cash and cash equivalents, beginning of period	54,835	56,781
Cash and cash equivalents, end of period	52,863	50,655
Supplemental disclosure of cash flow information:
Cash paid for interest	1,441	9,940
Cash paid for income taxes	686	1,581
Income tax refunds received	222	14
Supplemental disclosure of non cash investing and financing activity:
Issuance of PIK notes		$ 532