CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014		Mar. 31, 2013
Operating Activities:
Consolidated net income	$ 16,279		$ 19,604
Income (loss) from discontinued operations	8		(736)
Income from continuing operations	16,271		20,340
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	11,906		11,588
Other non-cash items	1,563		2,420
Net changes in operating assets and liabilities	(14,662)		(8,394)
Net cash provided by continuing operations	15,078		25,954
Net cash used in discontinued operations	99		(1,265)
Net cash provided by operating activities	15,177		24,689
Investing Activities:
Purchases of property, plant and equipment	(11,301)		(8,681)
Proceeds from sale of short-term investments	695		0
Purchases of short-term investments	0		(941)
Net cash used in investing activities	(10,606)		(9,622)
Financing Activities:
Net repayment of short-term debt	(735)		(81)
Purchase of common shares for treasury	0		(7,587)
Proceeds from issuance of stock under option plan	1,763		2,751
Excess tax benefits related to stock incentive programs	213		184
Dividends paid to non-controlling interest	(296)		(486)
Cash dividends paid	(1,722)		(1,754)
Net cash used in financing activities	(777)		(6,973)
Effect of exchange rate changes on cash and cash equivalents	(1,026)		(7,855)
Net increase in cash and cash equivalents	2,768		239
Cash and cash equivalents at beginning of period	490,267	[1]	454,092
Cash and cash equivalents at end of period	493,035	[2]	454,331
Supplemental disclosure of cash flow information:
Interest paid	59		172
Income taxes paid	5,575		5,657
Non-cash financing activities:
Treasury stock purchases settled after period-end	$ 0		$ 1,860

[1] Condensed from audited financial statements

[2] Unaudited