Shared-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Reconciliation of option activity
Number of options, Outstanding, Beginning Balance	1,141,000
Weighted-Average Exercise Price, Outstanding, Beginning Balance	$ 10.12
Number of Options, Granted	285	216
Weighted-Average Exercise Price, Granted	$ 8.85
Number of Options, Exercised	(17,000)
Weighted-Average Exercise Price, Exercised	$ 1.30
Weighted-Average Exercise Price, Forfeited or expired	$ 11.69
Number of Options, Forfeited or expired	(12,000)
Number of options, Outstanding, Ending Balance	1,397,000
Weighted-Average Exercise Price, Outstanding, Ending Balance	$ 9.95
Weighted-Average Remaining Contractual Term, Outstanding, Ending Balance	5 years 10 months 24 days
Aggregate Intrinsic Value, Outstanding, Ending Balance	$ 1,361
Number of Options, Options Exercisable	967,000
Weighted-Average Exercise Price, Options exercisable	$ 9.71
Weighted-Average Remaining Contractual Term, Options exercisable	4 years 4 months 24 days
Aggregate Intrinsic Value, Options exercisable	$ 1,341