Share-Based Compensation (Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, Beginning Balance	492,112	595,939	792,758
Options exercisable, Beginning Balance	454,966	530,724	741,723
Options granted	0	103,479	47,592
Options exercised	(16,552)	(52,131)	(89,971)
Options canceled/forfeited	(233,041)	(155,175)	(154,440)
Options outstanding, Ending Balance	242,519	492,112	595,939
Options exercisable, Ending Balance	224,933	454,966	530,724
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding, Weighted Average Exercise Price, Beginning of Period	$ 14.23	$ 20.54	$ 20.87
Options exercisable, Weighted Average Exercise Price, Beginning of Period	$ 14.06	$ 21.32	$ 21.57
Options granted, Weighted Average Exercise Price	$ 0.00	$ 6.87	$ 15.52
Options exercised, Weighted Average Exercise Price	$ 2.61	$ 15.10	$ 9.38
Options canceled/forfeited, Weighted Average Exercise Price	$ 18.86	$ 33.25	$ 27.20
Options outstanding, Weighted Average Exercise Price, Ending of Period	$ 10.57	$ 14.23	$ 20.54
Options exercisable, Weighted Average Exercise Price, Ending of Period	$ 10.08	$ 14.06	$ 21.32
Options granted, Weighted-Average Grant-Date Fair Value		$ 5.14	$ 7.52