Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Cash and cash equivalents at beginning of the period	$ 85,169	$ 95,108
Cash flows from operating activities:
Net loss	(23,102)	(285,392)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	15,743	18,015
Deferred taxes	576	211,321
Stock-based compensation	3,543	3,125
Impairment of goodwill	0	47,294
Gain on sale of assets	0	(2,655)
Gain on company owned life insurance	0	(1,174)
Change in pension and other postretirement plans	(493)	(1,963)
Changes in operating assets and liabilities:
Accounts receivable	8,630	7,363
Inventories	11,675	5,032
Other current assets	3,274	(4,703)
Accounts payable	(11,628)	(20,281)
Payroll and related expenses	(773)	(5,736)
Accrued expenses	(201)	(8,854)
Deferred revenue	12,553	13,041
Other long-term liabilities	(308)	(739)
Other operating activities	(484)	(493)
Net cash provided by (used in) operating activities	19,005	(26,799)
Cash flows from investing activities:
Additions to property, plant and equipment	(5,214)	(4,551)
Proceeds from sale of assets	0	2,359
Proceeds from company owned life insurance	0	8,962
Other investing activities	(682)	(346)
Net cash (used in) provided by investing activities	(5,896)	6,424
Cash flows from financing activities:
Proceeds from issuance of debt	15,000	0
Repayment of debt	(15,000)	0
Financing lease obligation	(1,194)	0
Stock options exercised and other	(580)	1,034
Net cash (used in) provided by financing activities	(1,774)	1,034
Effect of exchange rate changes on cash and cash equivalents	(1,791)	(1,056)
Net change in cash and cash equivalents	9,544	(20,397)
Cash and cash equivalents at end of the period	94,713	74,711
Supplemental cash flow information:
Cash paid during the period for income taxes	3,243	7,091
Cash paid during the period for interest	$ 553	$ 1,008