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Goodwill and Other Intangible Assets - Summary of Goodwill Activity (Detail) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Goodwill [Line Items] | ||
| Goodwill, net | $ 304,658 | $ 304,658 |
| Search and Content | ||
| Goodwill [Line Items] | ||
| Goodwill, net | 59,912 | 59,912 |
| Tax Preparation | ||
| Goodwill [Line Items] | ||
| Goodwill, net | 188,541 | 188,541 |
| E-Commerce | ||
| Goodwill [Line Items] | ||
| Goodwill, net | $ 56,205 | $ 56,205 |