XML 96 R48.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-Based Compensation - Summary of the Activity in the Company's Stock Option Plan (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Jun. 30, 2012
Mar. 31, 2012
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Roll Forward]              
Outstanding Beginning, Number of Options 280,000 280,000 402,997 620,000 620,000 620,000  
Outstanding, Weighted-Average Remaining Contractual Term 4 years 4 months 24 days 4 years 8 months 12 days 5 years 3 months 18 days 5 years 6 months   4 years 10 months 24 days 5 years 8 months 12 days
Exercised, Number of stock options       (217,003) (217,003)    
Exercisable Ending, Weighted-Average Remaining Contractual Term 4 years 3 months 18 days   5 years 1 month 6 days        
Outstanding Ending, Number of Options 280,000 280,000 402,997 402,997 402,997 280,000 620,000
Outstanding Beginning, Weighted Average Exercise price $ 2.91 $ 2.91 $ 2.78 $ 2.97 $ 2.97 $ 2.97  
Exercisable Ending, Number of Options 270,000   382,997   382,997    
Exercised, Weighted-Average Exercise Price       $ 3.33      
Outstanding Ending, Weighted-Average Exercise Price $ 2.91 $ 2.91 $ 2.78 $ 2.78 $ 2.78 $ 2.91 $ 2.97
Outstanding Beginning, Aggregate Intrinsic Value $ 6,816 $ 5,007 $ 3,997 $ 3,122 $ 3,122 $ 3,122  
Exercisable Ending , Weighted-Average Exercise Price $ 2.78   $ 2.60   $ 2.60    
Outstanding Ending, Aggregate Intrinsic Value 7,788 6,816 5,971 3,997 5,971 5,007 3,122
Exercisable Ending, Aggregate Intrinsic Value $ 7,543   $ 5,745   $ 5,745