Stock-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 6 Months Ended | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2013
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
Restricted Stock [Member]
|
Jun. 30, 2012
Restricted Stock [Member]
|
Jun. 30, 2013
Restricted Stock [Member]
|
Jun. 30, 2012
Restricted Stock [Member]
|
Mar. 31, 2013
Restricted Stock [Member]
|
Dec. 31, 2012
Restricted Stock [Member]
|
Mar. 31, 2012
Restricted Stock [Member]
|
Dec. 31, 2011
Restricted Stock [Member]
|
Jun. 30, 2013
Minimum [Member]
|
Jun. 30, 2013
Maximum [Member]
|
Jun. 30, 2013
Omnibus Incentive Plan New Plan 2012 [Member]
|
Jun. 30, 2013
Omnibus Incentive Plan New Plan 2012 [Member]
Restricted Stock [Member]
|
Jun. 30, 2013
2007 Stock Option and Incentive Plan (Prior Plan) [Member]
|
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||
Number of shares granted | 0 | |||||||||||||||||
Common shares available for grant | 4,411,760 | 4,411,760 | 5,000,000 | |||||||||||||||
Number of restricted shares outstanding | 732,240 | 200,000 | 732,240 | 200,000 | 245,400 | 246,320 | 0 | 0 | 588,240 | |||||||||
Stock options granted, vesting period range | 5 years | |||||||||||||||||
Stock options granted, vesting period, high end of range | 10 years | |||||||||||||||||
Exercise of common stock options, shares | 217,003 | 217,003 | ||||||||||||||||
Surrender of Shares | 71,409 | |||||||||||||||||
Recognized compensation expenses | $ 5 | $ 6 | $ 9 | $ 59 | $ 1,080 | $ 153 | $ 1,465 | $ 153 | ||||||||||
Unrecognized compensation expenses related to nonvested stock options | 15 | 15 | ||||||||||||||||
Recognition of remaining compensation expense over a weighted-average period | 10 months | 30 months | ||||||||||||||||
Total unrecognized compensation expense, Nonvested restricted stock arrangements granted | 15,364 | |||||||||||||||||
Tax benefit from restricted stock dividends | $ 280 | $ 437 | $ 61 | $ 83 |