Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Schedule of Restricted Stock Awards (Detail)

v2.4.0.8
Share-Based Compensation - Schedule of Restricted Stock Awards (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Number of Shares, Restricted stock at beginning of period 8,000 10,500
Number of Shares, Restricted stock vested (4,500) (7,000)
Number of Shares, Restricted stock at end of period 3,500 3,500
Weighted-Average Grant Date Fair Value Per Share, Restricted stock at beginning of period $ 10.97 $ 10.83
Weighted-Average Grant Date Fair Value Per Share, Restricted stock vested $ 10.95 $ 10.75
Weighted-Average Grant Date Fair Value Per Share, Restricted stock at end of period $ 10.99 $ 10.99