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Stock-Based Compensation (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended
Jun. 29, 2011
employee
Jun. 30, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Maximum Percent of Shares Allowable In Incentive Plan     12.50%    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)     671,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized   $ 252 $ 2,795    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (in years)     1 year 8 months 12 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares) 814,500   195,000 0 81,500
Share-based Compensation Arrangement by Share-based Payment Award, Number of Employees 97        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) 267,372        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years)   2 years 10 years    
Share-based Compensation     1,798 1,306 2,810
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period (in years)     4 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)     $ 1.79 $ 1.72 $ 4.08
Proceeds from Stock Options Exercised     811 0 376
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value     520 0 256
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)     394,938 72,250  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value (in Dollars per share)     1,728 307  
Allocated Share-based Compensation Expense     1,798 1,306 2,810
Second Anniversary of Award Date
         
Percent of Options Vesting     50.00%    
Third Anniversary of Award Date
         
Percent of Options Vesting     25.00%    
Fourth Anniversary of Award Date
         
Percent of Options Vesting     25.00%    
Minimum
         
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years)     2 years    
Maximum
         
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years)     4 years    
Stock Option Exchange Plan
         
Share-based Compensation     63 126 63
Non-Vested Stock Options
         
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized     20    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (in years)     255 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)     $ 1.79    
The First Type of Restriced Stock Units
         
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years)     3 years    
The Second Type of Restricted Stock Units
         
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years)     2 years    
The Second Type of Restricted Stock Units | Second Anniversary of Award Date
         
Percent of Options Vesting     67.00%    
The Second Type of Restricted Stock Units | Third Anniversary of Award Date
         
Percent of Options Vesting     33.00%    
The Third Type of Restricted Stock Units
         
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (in years)     2 years    
The Third Type of Restricted Stock Units | Second Anniversary of Award Date
         
Percent of Options Vesting     67.00%    
The Third Type of Restricted Stock Units | Third Anniversary of Award Date
         
Percent of Options Vesting     33.00%    
Restricted Stock Units (RSUs)
         
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized     2,775    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition (in years)     1 year 8 months 12 days    
Allocated Share-based Compensation Expense     2,043 1,314 672
Deferred directors fees
         
Allocated Share-based Compensation Expense     $ 0 $ 58 $ 61