Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Plan (Narrative) (Details)

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Stock-Based Compensation Plan (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Maximum number of shares of common stock that may be granted through awards to any employee in any calendar year 500
Number of stock options issued under a plan 653
Stock options expected to vest within a year from grant date 40
Nonvested options that will vest in consequent years 113
Nonvested options that will vest on December 31, 2014 43
Nonvested options that will vest on December 31, 2015 and December 31, 2016 34
Nonvested options that will vest on December 31, 2017 2
Stock options granted fair value $ 2,469
Unvested stock options 1,248
Unrecognized compensation cost related to unvested stock options 3,550
Unvested restricted stock awards 750
Unrecognized compensation cost related to unvested restricted stock awards $ 123
Stock Option Two [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of stock options issued under a plan 500