|
Stock-Based Compensation - Additional Information (Detail) (USD $)
|
6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 1 Months Ended | ||
|---|---|---|---|---|---|---|---|
|
Jun. 30, 2013
|
Mar. 31, 2013
Restricted Stock Units [Member]
|
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
|
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
|
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
|
Jun. 30, 2012
Restricted Stock Units (RSUs) [Member]
|
Mar. 31, 2013
Non-Management Director [Member]
|
|
| Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] | |||||||
| Common stock, granted | 142,157 | ||||||
| Common stock aggregate value, granted | $ 400,000 | ||||||
| Common stock, granted | 411,629 | ||||||
| Common stock, grant date fair value | 1,000,000 | ||||||
| Stock based compensation expense | $ 184,000 | $ 100,000 | $ 0 | $ 184,000 | $ 0 | ||