Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Income Statement [Abstract]
Net revenues	$ 128,542	$ 147,406
Cost of revenues	72,005	85,120
Gross profit	56,537	62,286
Selling, general, and administrative expenses	51,306	54,346
Research and development	4,543	3,882
Restructuring expenses	1,304	1,892
Acquisition costs	79	0
Other operating income	(361)	0
Operating (loss) income	(334)	2,166
Interest income	227	267
Interest expense	938	1,256
Other gain (loss), net	371	(86)
(Loss) earnings before income taxes	(674)	1,091
Income tax expense	71	1,220
Net loss	$ (745)	$ (129)
Net loss per common share:
Basic loss per share (USD per share)	$ (0.02)	$ 0.00
Diluted loss per share (USD per share)	$ (0.02)	$ 0.00
Dividends declared per share (USD per share)	$ 0.50	$ 0