Stockholders' Equity - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
1 Months Ended | 3 Months Ended | |
---|---|---|---|
Mar. 31, 2014
|
Mar. 31, 2014
|
Mar. 31, 2013
|
|
Stockholders Equity Note [Line Items] | |||
Proceeds from sale of common stock | $ 196,800 | $ 198,042 | $ 208 |
Share of common stock issued | 7,360,000 | ||
Underwriter
|
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Stockholders Equity Note [Line Items] | |||
Share of common stock issued | 960,000 |