Stock-Based Compensation - Aggregate Intrinsic Value (Detail) - USD ($) $ in Thousands |
Sep. 30, 2015 |
Sep. 30, 2014 |
---|---|---|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Aggregate intrinsic value, Stock option | $ 584 | $ 7,448 |
Restricted Stock [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Aggregate intrinsic value, Restricted stock | $ 1,470 | $ 3,047 |