Stock-Based Compensation and Stock Options - Stock Option Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jan. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, beginning (in shares)	300,000	317,725	317,725		317,725
Exercisable and fully vested (in shares)	150,000	75,000	17,725
Exercised (in shares)		(17,725)
Options granted (in shares)	100,000
Options outstanding, ending (in shares)	400,000	300,000	317,725	317,725	317,725
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding, weighted average exercise price, beginning (in dollars per share)	$ 14.97	$ 14.26	$ 14.26		$ 14.26
Exercised, weighted average exercise price (in dollars per share)		$ 2.28
Exercise Price	$ 28.98
Exercisable and fully vested, weighted average exercise price (in dollars per share)	$ 14.97	$ 14.97	$ 2.28
Options outstanding, weighted average exercise price, ending (in dollars per share)	$ 18.47	$ 14.97	$ 14.26	$ 14.26	$ 14.26
Options Outstanding Weighted- Average Remaining Contractual Life	7 years 5 months 6 days	7 years 10 months 21 days	8 years 5 months 9 days	2 years 1 month 2 days
Options Exercisable Weighted- Average Remaining Contractual Life	6 years 10 months 21 days	7 years 10 months 21 days	11 months 12 days
Vested and expected to vest, outstanding, aggregate intrinsic value (in dollars)	$ 1,206	$ 2,883	$ 8,616	$ 9,900
Vested and expected to vest, exercisable, aggregate intrinsic value (in dollars)	$ 603	$ 721	$ 693