Stock-Based Compensation (Stock Option Activity) (Details) - Stock options [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Shares outstanding, beginning balance (shares)	3,325,103
Shares granted (shares)	401,365
Shares exercised (shares)	(29,128)
Shares forfeited (shares)	(179,281)
Shares expired (shares)	(180,275)
Shares outstanding, ending balance (shares)	3,337,784	3,325,103
Shares exercisable (shares)	1,432,579
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, outstanding, beginning balance (in usd per share)	$ 6.66
Weighted Average Exercise Price, Granted (in usd per share)	4.81
Weighted Average Exercise Price, Exercised (in usd per share)	3.13
Weighted Average Exercise Price, Forfeited (in usd per share)	6.40
Weighted Average Exercise Price, Expired (in usd per share)	9.63
Weighted Average Exercise Price, outstanding, ending balance (in usd per share)	6.36	$ 6.66
Weighted Average Exercise Price, exercisable (in usd per share)	$ 8.09
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Term, Outstanding	4 years 8 months 5 days	4 years 7 months 30 days
Weighted Average Remaining Contractual Term, Exercisable	3 years 5 months 27 days
Aggregate Intrinsic Value, Outstanding	$ 70	$ 711
Aggregate Intrinsic Value, Exercisable	$ 70
Weighted average grant date fair value, options granted (in dollars per share)	$ 2.32	$ 1.80	$ 2.50
Total intrinsic value, options exercised	$ 40	$ 1,700	$ 400