Property and Equipment - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 19,210 | $ 15,517 |
| Less accumulated depreciation | (11,678) | (7,595) |
| Net property and equipment | 7,532 | 7,922 |
| Computer Equipment and Software [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 9,858 | 8,150 |
| Furniture and Fixtures [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 2,409 | 1,999 |
| Leasehold Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 6,943 | $ 5,368 |