Segment Reporting (Schedule Of Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2010	Oct. 02, 2010	Jul. 03, 2010	Apr. 03, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Segment Reporting Information [Line Items]
Net sales to external customers	$ 77,080	$ 64,807	$ 59,711	$ 52,566	$ 58,515	$ 45,286	$ 45,705	$ 42,269	$ 254,164	$ 191,775	$ 147,703
Operating Income (Loss)									32,858	16,927	(10,989)
Capital expenditures									5,988	4,753	3,949
Total assets	312,791				266,019				312,791	266,019	235,710
Long-Lived Assets	41,692				41,459				41,692	41,459	41,657
Total Assets	312,791				266,019				312,791	266,019	235,710
Americas Region [Member]
Segment Reporting Information [Line Items]
Net sales to external customers									97,484	72,383	55,062
Operating Income (Loss)									8,864	185	(13,353)
Long-lived assets	23,024				22,182				23,024	22,182	21,579
Capital expenditures									3,371	1,864	2,898
Total assets	167,579				140,667				167,579	140,667	131,477
Total Assets	167,579				140,667				167,579	140,667	131,477
Europe/Africa Region [Member]
Segment Reporting Information [Line Items]
Net sales to external customers									99,568	74,724	62,968
Operating Income (Loss)									6,909	6,362	(371)
Long-lived assets	16,592				17,212				16,592	17,212	18,245
Capital expenditures									1,748	2,236	515
Total assets	92,231				83,691				92,231	83,691	74,126
Total Assets	92,231				83,691				92,231	83,691	74,126
Asia Pacific Region [Member]
Segment Reporting Information [Line Items]
Net sales to external customers									57,112	44,668	29,673
Operating Income (Loss)									17,085	10,380	2,735
Long-lived assets	2,076				2,065				2,076	2,065	1,833
Capital expenditures									869	653	536
Total assets	52,981				41,661				52,981	41,661	30,107
Total Assets	$ 52,981				$ 41,661				$ 52,981	$ 41,661	$ 30,107