Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 5,693	$ 20,684
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant and equipment	(92,043)	(43,408)
Proceeds from life insurance policy	352	297
Proceeds from sales and maturities of investments	3,750	3,970
Purchase of investments	(3,750)	(3,750)
Proceeds from sale of property, plant and equipment	1,973	13
Premiums paid for life insurance	(340)	(347)
Other	158	0
NET CASH USED IN INVESTING ACTIVITIES	(89,900)	(43,225)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash dividends paid	(14,605)	0
Payments for Repurchase of Common Stock	21,790	0
Proceeds from exercise of stock options	5,568	1,515
Excess tax benefits from exercise of stock options	47	322
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(30,780)	1,837
Effect of exchange rate changes on cash	(1,181)	64
Net decrease in cash and cash equivalents	(116,168)	(20,640)
Cash and cash equivalents at the beginning of the period	199,301	203,364
Cash and cash equivalents at the end of period	$ 83,133	$ 182,724