Status Summary of Non-Vested Shares (Detail) - Performance Based Restricted Stock - $ / shares |
3 Months Ended | 6 Months Ended | ||||
---|---|---|---|---|---|---|
Jun. 30, 2016 |
Mar. 31, 2016 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
Number of Shares, Beginning balance | 95,008 | 104,403 | 111,407 | 103,907 | 104,403 | 103,907 |
Number of Shares, Granted | 52,170 | 7,500 | 52,170 | 7,500 | ||
Number of Shares, Forfeited | (19,612) | (9,395) | ||||
Number of Shares, Ending Balance | 127,566 | 95,008 | 111,407 | 111,407 | 127,566 | 111,407 |
Weighted Average Grant-Date Fair Value, Beginning balance | $ 16.99 | $ 17.05 | $ 17.31 | $ 17.77 | $ 17.05 | $ 17.77 |
Weighted Average Grant-Date Fair Value, Granted | 14.39 | 10.96 | ||||
Weighted Average Grant-Date Fair Value, Forfeited | 28.25 | 17.65 | ||||
Weighted Average Grant-Date Fair Value, Ending balance | $ 14.20 | $ 16.99 | $ 17.31 | $ 17.31 | $ 14.20 | $ 17.31 |