CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012
Operating Activities:
Consolidated net income	$ 59,893	$ 58,030
Loss from discontinued operations	(5,704)	(1,549)
Income from continuing operations	65,597	59,579
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	35,233	37,433
Payments relating to restructuring activities	(254)	(826)
Pension plan funding	(7,399)	(11,760)
Tax benefits related to stock incentive programs	488	270
Other non-cash items	4,847	6,891
Net changes in operating assets and liabilities	(5,150)	15,729
Net cash provided by continuing operations	93,362	107,316
Net cash used in discontinued operations	(2,528)	(2,523)
Net cash provided by operating activities	90,834	104,793
Investing Activities:
Purchases of property, plant and equipment	(32,028)	(37,846)
Proceeds from sale of short-term investments	2,377	9,310
Purchases of short-term investments	(5,407)	(4,062)
Net cash used in investing activities	(35,058)	(32,598)
Financing Activities:
Repayment of long-term debt	(1,705)	(8,280)
Net issuance (repayment) of short-term debt	30	(937)
Purchase of common shares for treasury	(42,910)	(8,710)
Proceeds from issuance of stock under option plan	11,403	6,190
Excess tax benefits related to stock incentive programs	2,115	38
Dividends paid to non-controlling interest	(763)	(3,394)
Cash dividends paid	(5,229)	(2,656)
Net cash provided by (used in) financing activities	(37,059)	(17,749)
Effect of exchange rate changes on cash and cash equivalents	(3,155)	(492)
Net increase in cash and cash equivalents	15,562	53,954
Cash and cash equivalents at beginning of period	454,092	395,152
Cash and cash equivalents at end of period	469,654	449,106
Supplemental disclosure of cash flow information:
Interest paid	2,129	1,791
Income taxes paid	21,482	15,378
Non-cash financing activities:
Treasury stock purchases settled after period-end	$ 1,100	$ 0