Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 25,208	$ 1,541
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant and equipment	(23,335)	(55,478)
Proceeds from life insurance policy	278	352
Proceeds from sales and maturities of investments	2,600	2,800
Purchase of investments	0	(2,800)
Proceeds from sale of property, plant and equipment	1,758	93
Other	37	71
NET CASH USED IN INVESTING ACTIVITIES	(18,662)	(54,962)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(9,589)	(9,776)
Payments for Repurchase of Common Stock	(7,547)	(12,979)
Proceeds from exercise of stock options	6,484	3,471
Excess tax benefits from exercise of stock options	6	26
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(10,646)	(19,258)
Effect of exchange rate changes on cash	(1,010)	75
Net decrease in cash and cash equivalents	(5,110)	(72,604)
Cash and cash equivalents at the beginning of the period	62,451	$ 199,301
Cash and cash equivalents at the end of period	$ 57,341