Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v2.4.0.8
Stock-Based Compensation - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]        
Stock options granted, exercisable life     5 years  
Stock options vesting period     3 years  
Stock options, authorized 2,127,046   2,127,046  
Non-cash compensation expense $ 800,000 $ 400,000 $ 2,238,000 $ 1,704,000
Tax benefits related to stock based compensation     0  
Unrecognized compensation costs $ 1,700,000   $ 1,700,000  
Compensation costs expected to be recognized     1 year 4 months 24 days