Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Detail)

v2.4.0.8
Share-Based Compensation - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]        
Share-based compensation expense $ 447,000 $ 92,000 $ 1,051,000 $ 189,000
Related tax benefits on non-qualified stock options $ 72,000 $ 21,000 $ 183,000 $ 32,000
Number of shares, stock options exercised 18,500 562 33,695 2,241
Restricted stock awards, continuous employment period for vesting of grant     Three to five years