Common Stock And Stock Options (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
Common Stock And Stock Options [Abstract]
Number of Shares, Outstanding at December 31	1,085	1,072	1,054
Number of Shares, Options forfeited	(3)	(95)	(40)
Number of Shares, Options granted	182	177	127
Number of Shares, Options exercised	(20)	(69)	(69)
Number of Shares, Outstanding at December 31,	1,244	1,085	1,072
Weighted-average Exercise Price, Outstanding at December 31,	$ 5.84	$ 5.60	$ 5.67
Weighted-average Exercise Price, Options forfeited	$ 6.76	$ 3.07	$ 4.97
Weighted-average Exercise Price, Options granted	$ 6.42	$ 4.43	$ 3.44
Weighted-average Exercise Price, Options exercised	$ 2.54	$ 2.30	$ 3.11
Weighted-average Exercise Price, Outstanding at December 31,	$ 5.97	$ 5.84	$ 5.60
Aggregate Intrinsic Value, Outstanding at December 31, 2012				$ 432
Number of Shares, Exercisable at December 31,	925	840
Weighted-average Exercise Price, Exercisable at December 31,	$ 6.13	$ 6.32
Aggregate Intrinsic Value, Exercisable at December 31,	$ 425	$ 1,422
Number of Shares, Available for future grant at January 1, 2012	239
Number of Shares, Available for future grant at December 31, 2012	359	239