XML 28 R52.htm IDEA: XBRL DOCUMENT v2.4.0.6
Equity Incentive Plan - Additional Information (Detail) (USD $)
1 Months Ended 12 Months Ended
Jun. 07, 2011
Jun. 05, 2009
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Jun. 04, 2003
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares reserved for grant under stock option and incentive plan 3,150,000 2,350,000       1,500,000
Increase in shares reserved for grant under stock option and incentive plan 800,000 850,000        
Options outstanding     1,793,685      
Share based compensation expense     $ 1,151,199 $ 1,190,697 $ 1,102,617  
Options and SAR's vested or expected to vest     1,763,000      
Options and SAR's vested or expected to vest, weighted-average exercise price     $ 8.56      
Options and SAR's vested or expected to vest, aggregate intrinsic value     4,000,000      
Options and SAR's vested or expected to vest, weighted average remaining contractual term     4 years 7 months 17 days      
Unrecognized stock-based compensation cost     1,826,000      
Unrecognized stock-based compensation cost, weighted-average recognition period     2 years 4 months 24 days      
Intrinsic value of fully vested Options and SARs     2,115,267 2,390,591    
Intrinsic value of outstanding Options and SARs     4,074,471 6,107,869    
Intrinsic value of stock options and SARs     2,214,516 679,401    
Fair value of options and SAR's vested     997,194 774,648    
Cash received from exercise of stock options     388,676 160,470    
Fair value of restricted stock and restricted stock units vested     $ 203,485      
Stock Option Plan Nineteen Ninety Three
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options outstanding     1,938      
Stock Awards | Minimum
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock option and incentive plan, vesting period     1 year      
Stock Awards | Maximum
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock option and incentive plan, vesting period     4 years      
Stock Option
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares reserved for grant under stock option and incentive plan     763,145      
Incentive Stock Options
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options exercisable     247,934      
Stock options exercisable, weighted-average exercise price     $ 8.71      
Stock options exercisable, weighted average remaining contractual term     4 years 1 month 21 days      
Nonqualified Stock Options
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options exercisable     222,002      
Stock options exercisable, weighted-average exercise price     $ 8.94      
Stock options exercisable, weighted average remaining contractual term     3 years 1 month 17 days      
Stock Appreciation Rights (SARs)
           
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock options exercisable     570,460      
Stock options exercisable, weighted-average exercise price     $ 8.35      
Stock options exercisable, weighted average remaining contractual term     5 years 5 months 5 days