Stockholders' Equity - Additional Information (Detail) - shares |
3 Months Ended | 9 Months Ended |
|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2016 |
|
| Equity [Abstract] | ||
| Repurchase of common stock authorized remaining, Shares | 1,132,946 | |
| Repurchase of common stock, shares | 92,804 | 0 |