Stock-Based Compensation (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of option activity
Outstanding at January 1, 2012, Shares	2,860,890
Outstanding at January 1, 2012, Weighted Average Exercise Price ( Per Share)	$ 6.61
Granted, Shares	707,057
Granted, Weighted Average Exercise Price ( Per Share)	$ 7.60
Exercised, Shares	(141,849)
Exercised, Weighted Average Exercise Price ( Per Share)	$ 3.93
Exercised, Aggregate Intrinsic Value	$ 467
Forfeited, Shares	(411,938)
Forfeited, Weighted Average Exercise Price ( Per Share)	$ 6.66
Expired, Shares	(30,000)
Expired, Weighted Average Exercise Price ( Per Share)	$ 31.60
Outstanding at December 31, 2012, shares	2,984,160
Outstanding at December 31, 2012, Weighted Average Exercise Price ( Per Share)	$ 6.70
Outstanding at December 31, 2012, Weighted Average Remaining Contractual Term	3 years 3 months 29 days
Outstanding at December 31, 2012, Aggregate intrinsic value	3,147	400	100
Exercisable at December 31, 2012, Shares	1,691,200
Exercisable at December 31, 2012, Weighted Average Exercise Price ( Per Share)	$ 6.78
Exercisable at December 31, 2012, Weighted Average Remaining Contractual Term	1 year 6 months 11 days
Exercisable at December 31, 2012, Aggregate Intrinsic Value	$ 2,347