Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plan (Narrative) (Details)

v2.4.0.6
Stock-Based Compensation Plan (Narrative) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
0 Months Ended 12 Months Ended
Jan. 17, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
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 shares authorized under the plan   5,015    
Annual automatic increase in shares authorized under the plan, percentage   4.00%    
Number of stock options issued under a plan   770    
Stock options granted fair value   $ 3,011 $ 987 $ 2,315
Fair value of the restricted stock awards granted     1,567 2,990
Unvested stock options   1,155    
Unrecognized compensation cost related to unvested stock options   $ 3,709    
Unvested restricted stock awards   750    
Restricted stock awards granted in period 250      
Restricted stock award term   7 years    
Threshold share price period for vesting condition   20 days    
Threshold share price   $ 14.00    
Vesting In Three Installments [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Nonvested options that will vest in consequent years   45    
Vesting In Four Installments [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Nonvested options that will vest in consequent years   185    
Vesting On March 31, 2015 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting, first installment   17    
Vesting On December 31, 2014 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting, first installment   43    
Vesting On December 31, 2015 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting, second installment   64    
Vesting On December 31, 2016 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting, third installment   55    
Vesting On December 31, 2017 [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares vesting, forth installment   23    
Stock Option One [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock options issued under a plan   270   100
Stock Option One [Member] | Vest In Four Equal Consecutive Quarterly Tranches From The Date Of Grant
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options expected to vest within a year from grant date   40    
Stock Option Two [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock options issued under a plan   500   540
Restricted Stock
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unvested restricted stock awards   750 750  
Restricted Stock Units (RSUs) [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unvested restricted stock awards     92