Stockholders' Equity (Schedule of Summary of Activity Unser Stock Options Plans)(Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Stockholders' Equity [Abstract]
Shares, Outstanding, Beginning of Year	513
Shares, Granted	62
Shares, Exercised	(100)
Shares, Forfeited	(62)
Shares, Expired	(47)
Shares, Outstanding, End of Year	366
Shares, Exercisable, End of Year	144
Shares, Vested and Expected to Vest, End of Year	308
Weighted-Average Exercise Price, Outstanding, Beginning of Year	$ 20.01
Weighted-Average Exercise Price, Granted	$ 15.60
Weighted-Average Exercise Price, Exercised	$ 17.65
Weighted-Average Exercise Price, Forfeited	$ 11.97
Weighted-Average Exercise Price, Expired	$ 70.00
Weighted-Average Exercise Price, Outstanding, End of Year	$ 14.87
Weighted-Average Exercise Price, Exercisable, End of Year	$ 21.38
Weighted-Average Exercise Price, Vested and Expected to Vest, End of Year	$ 15.69
Weighted-Average Remaining Contractual Term, Outstanding, End of Year	7 years 9 months 15 days
Weighted-Average Remaining Contractual Term, Exercisable, End of Year	6 years 3 months 0 days
Weighted-Average Remaining Contractual Term, Vested and Expected to Vest, End of Year	7 years 7 months 2 days
Total Intrinsic Value, exercised	$ 1,771
Aggregate Intrinsic Value, Outstanding, End of Year	17
Aggregate Intrinsic Value, Exercisable, End of Year	0
Aggregate Intrinsic Value, Vested and Expected to Vest, End of Year	$ 11