Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Operating activities:
Net income	$ 25,389	$ 11,488
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,007	6,232
Amortization of intangibles	3,159	1,572
Stock-based compensation	1,465	1,779
Non-cash inventory charge	1,409
Excess tax benefit on share-based compensation	(1,057)	(467)
Loss (gain) on sale of assets	69	(24)
Impairment and equity in net loss of unconsolidated affiliate		10,678
Changes in operating assets and liabilities:
Accounts receivable	(6,503)	(9,745)
Inventories	(774)	3,632
Accounts payable	3,056	2,452
Accrued expenses (including post-retirement)	(6,455)	(4,619)
Accrued payroll and severance	(12,762)	(7,319)
Accrued taxes	1,153	(640)
Prepaid expenses and other	(3,647)	1,026
Net cash provided by operating activities	11,509	16,045
Investing activities:
Acquisition of business, net of cash acquired	(52,000)
Purchases of property, plant, and equipment	(6,423)	(5,453)
Purchase of short-term investments		(8,478)
Proceeds from sale of assets	15	9
Net cash used in investing activities	(58,408)	(13,922)
FINANCING activities:
Proceeds from revolving credit facility	75,000	15,000
Payments of revolving credit facility	(8,000)	(5,000)
Payments of term loan	(1,250)
Debt issuance costs	(108)
Cash dividends paid	(4,944)	(4,410)
Proceeds from exercise of stock options	3,676	5,283
Excess tax benefit on share-based compensation	1,057	467
Net cash provided by financing activities	65,431	11,340
Effect of exchange rate changes on cash and cash equivalents	(3,918)	(1,972)
Increase in cash and cash equivalents	14,614	11,491
Cash and cash equivalents at beginning of period	305,192	235,404
Cash and cash equivalents at end of period	$ 319,806	$ 246,895