Shareholders' Equity And Stock-Based Compensation (Narrative) (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended			6 Months Ended							3 Months Ended			6 Months Ended
	Jul. 23, 2008 D	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Jun. 30, 2012 2006 Equity Incentive Plan [Member]	May 01, 2012 2006 Equity Incentive Plan [Member]	Apr. 21, 2010 2006 Equity Incentive Plan [Member]	Jun. 30, 2012 2001 Stock Option Plan And Non-Employee Directors' Stock Option Plan [Member]	Jun. 30, 2012 Employee Stock Purchase Plan [Member]	Jun. 30, 2011 Employee Stock Purchase Plan [Member]	Apr. 27, 2011 Employee Stock Purchase Plan [Member]	Jun. 30, 2012 Employee Stock Purchase Plan [Member]	Jun. 30, 2011 Employee Stock Purchase Plan [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Aggregate number of shares of common stock which awards could be granted		359			359		239	699			267
Authorized additional number of shares of common stock reserved and issuable									300	250
Minimum vesting period of options under equity incentive plan, years					three
Maximum vesting period of options under equity incentive plan, years					10
Shares issued in lieu of cash for director fees under director program		1	1		1	1
Maximum amount of common stock participants may elect to purchase	$ 100,000
Window period	20
Weighted average fair value of options granted		$ 4.28	$ 2.63		$ 3.84	$ 2.57
Weighted average remaining contractual life of options exercisable, years					5.24
Stock option expense		99,000		63,000	195,000	82,000
Unrecognized compensation costs on non-vested awards		$ 899,000			$ 899,000
Unrecognized compensation costs. period of recognition, years					2.12
Maximum number of shares approved under purchase plan												100			100
Increase in maximum number of shares approved														100
Shares purchased for award												5	4		9	8