Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Additional Information (Detail)

v2.4.0.8
Stock Incentive Plan - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2012
EquityPlan
Dec. 31, 2013
Dec. 31, 2013
OptionPlan
EquityPlan
Dec. 31, 2012
Employee
EquityPlan
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock option plans     1    
Awards issued to number of employees       2  
Number of outstanding accelerated vesting stock awards 2     2  
Accelerated additional compensation cost $ 0.1        
Closing stock price   $ 8.70 $ 8.70    
Total fair value of options vested     0.8 1.2 1.0
Total unrecognized compensation cost related to non-vested awards of stock options   $ 2.4 $ 2.4    
Total unrecognized compensation cost related to non-vested awards of stock options, weighted average recognition period   1 year 10 months 10 days      
Restricted stock
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation, vesting period     1 year    
Stock Option
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized under plan   5,000,000 5,000,000    
Minimum
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option, historical volatility term     6 years    
Minimum | Stock Option
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation, vesting period     4 years    
Maximum
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock option, historical volatility term     10 years    
Maximum | Stock Option
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options, term     5 years