Shareholders' Equity And Stock-Based Compensation (Narrative) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended			12 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2012 2006 Equity Incentive Plan [Member]	Dec. 31, 2010 2006 Equity Incentive Plan [Member]	Sep. 30, 2013 2001 Stock Option Plan And Non-Employee Directors' Stock Option Plan [Member]	Sep. 30, 2013 Employee Stock Purchase Plan [Member]	Sep. 30, 2012 Employee Stock Purchase Plan [Member]	Sep. 30, 2013 Employee Stock Purchase Plan [Member]	Sep. 30, 2012 Employee Stock Purchase Plan [Member]	Sep. 30, 2013 Minimum [Member] 2006 Equity Incentive Plan [Member]	Sep. 30, 2013 Maximum [Member] 2006 Equity Incentive Plan [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Aggregate number of shares of common stock which awards could be granted	180		180		359	699		265
Increase in maximum number of shares approved						300	250				100
Vesting period of options under equity incentive plan													3 years
Term of options														10 years
Shares issued in lieu of cash for director fees under director program	0	1	0	1
Maximum amount of common stock participants may elect to purchase			$ 100
Window period	20 days		20 days
Weighted average fair value of options granted			$ 2.52	$ 3.84
Expected forfeiture rate of stock options			5.00%
Weighted average remaining contractual life of options exercisable, years			5 years 4 months 21 days
Stock option expense	136	113	402	308
Unrecognized compensation costs on non-vested awards	$ 756		$ 756
Unrecognized compensation costs, period of recognition, years			1 year 8 months 23 days
Maximum number of shares approved under purchase plan									100		100
Shares purchased for award									6	5	19	13