Basic And Diluted Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Numerator:
Net income (loss)	$ (6,971)	$ 13,692
Denominator:
Basic weighted-average shares outstanding (in shares)	28,144,000	27,571,000
Effect of dilutive employee stock options and restricted stock units (in shares)	0	992,000
Diluted weighted-average shares outstanding (in shares)	28,144,000	28,563,000
Net income per share - basic (in dollars per share)	$ (0.25)	$ 0.50
Net income per share - diluted (in dollars per share)	$ (0.25)	$ 0.48
Antidilutive securities excluded from computation of earnings per share (in shares)	2,900,000	1,100,000