Stock-Based Compensation (Stock Incentive Plan) (Details) - Stock Option [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jul. 01, 2014	Jun. 30, 2015	Jul. 01, 2014
Options, Outstanding [Roll Forward]
Outstanding, beginning of period	3,225,078	3,157,914	3,245,264	3,309,872
Granted	351,305	231,552	527,321	231,552
Exercised	52,664	50,989	175,551	193,238
Forfeited	5,034	13,655	78,349	23,364
Outstanding, end of period	3,518,685	3,324,822	3,518,685	3,324,822
Weighted average fair market value on option grant date	$ 5.81	$ 10.93	$ 5.95	$ 10.93
Stock based compensation expense	$ 512	$ 536	$ 699	$ 694
Capitalized stock based compensation expense	$ 59	$ 29	$ 99	$ 12