XML 22 R31.htm IDEA: XBRL DOCUMENT v2.4.0.6
Employee Benefit Plans - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Increase to shares available for award under Stock Plan     2,000,000  
Options granted 1,532,500 1,532,500 1,532,500 0
Restricted stock, granted 250,000 250,000 250,000 231,250
Unrecognized stock compensation $ 1.0   $ 1.0  
Unrecognized stock compensation, weighted average remaining life     2 years 292 days  
Monte Carlo Simulation
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected life of options (in years)     6 years  
Plain vanilla approach
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected life of options (in years)     10 years  
Selling, General and Administrative Expenses
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-cash compensation expense $ 0.1 0.2 $ 0.1 0.2
Stock option
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Number of consecutive trading days on which stock will be exercisable if company stock traded above or at set price 20 days   20 days  
Stock option | Monte Carlo Simulation
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected volatility of option granted estimated based upon historical volatility of pricing model, corresponding pricing model expected term     6 years 252 days