Stock-Based Compensation (Stock Incentive Plan) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2014	Apr. 02, 2013
Stock Option [Member]
Options, Outstanding [Roll Forward]
Outstanding, beginning of period	3,309,872	2,973,168
Granted	0	0
Exercised	142,249	0
Canceled	9,709	27,782
Outstanding, end of period	3,157,914	2,945,386
Stock based compensation expense	$ 140	$ 363
Capitalized stock based compensation expense	18	26
Selling, General and Administrative Expenses [Member] | Employee Stock Purchase Plan [Member]
Options, Outstanding [Roll Forward]
Stock based compensation expense	$ 21