Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012
Cash flows from operating activities:
Consolidated net income	$ 3,043	$ 3,765
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,305	10,429
Share-based compensation	4,212	3,479
Deferred income taxes	2,130	(657)
Earnings from equity investment	(1,181)	(364)
Loss on disposal of business	592
Non-cash interest expense	735	796
Non-cash restructuring charges	179	3,599
Other non-cash items	1,079	91
Changes in operating assets and liabilities:
Accounts receivable	(7,097)	(5,766)
Inventories	470	(62)
Income taxes receivable and prepaid income taxes	12,523	122
Prepaid expenses and other current assets	1,927	1,813
Deferred revenue	(842)	(2,975)
Accounts payable, accrued expenses, income taxes payable and other current liabilities	1,164	6,183
Other non-current assets and liabilities	209	1,046
Cash provided by operating activities	34,448	21,499
Cash flows from investing activities:
Purchases of property, plant and equipment	(3,073)	(3,734)
Acquisition of business	(82,653)
Proceeds from the sale of property, plant and equipment	4,615	283
Proceeds from sale of business, net of transaction costs of $1,060	8,190
Cash used in investing activities	(72,921)	(3,451)
Cash flows from financing activities:
Proceeds from issuance of debt	60,000
Repayments of long-term debt	(5,625)	(7,500)
Repayments of borrowings under the revolving credit facility	(26,000)	(13,000)
Payments for debt issuance costs	(145)	(92)
Payments of withholding taxes from stock-based awards	(820)	(100)
Capital lease payments	(608)	(596)
Cash provided by (used in) financing activities	26,802	(21,288)
Effect of exchange rates on cash and cash equivalents	(427)	1,268
Decrease in cash and cash equivalents	(12,098)	(1,972)
Cash and cash equivalents, beginning of period	65,788	54,835
Cash and cash equivalents, end of period	53,690	52,863
Supplemental disclosure of cash flow information:
Cash paid for interest	1,674	1,441
Cash paid for income taxes	1,935	686
Income tax refunds received	$ 12,607	$ 222