|
Useful Life of Other Purchased Intangible Assets (Detail)
|
12 Months Ended |
|---|---|
|
Dec. 31, 2012
|
|
|
Purchased data files | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 15 years |
|
Purchased data files | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 2 years |
|
Acquired software and technology | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 10 years |
|
Acquired software and technology | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 1 year |
|
Non-compete agreements | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 10 years |
|
Non-compete agreements | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 1 year |
|
Proprietary database | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 10 years |
|
Proprietary database | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 6 years |
|
Customer relationships | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 25 years |
|
Customer relationships | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 2 years |
|
Trade names | Maximum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 15 years |
|
Trade names | Minimum [Member]
|
|
| Finite-Lived Intangible Assets [Line Items] | |
| Useful Life | 5 years |