Goodwill and Intangibles, Net, Measured on Non-Recurring Basis Using Market Approach (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill (annual impairment assessment)	$ 90,352	$ 87,812
Acquired intangible assets (periodic assessment, as necessary)	58,755	61,687
Fair Value, Inputs, Level 3
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill (annual impairment assessment)	90,352	87,812
Acquired intangible assets (periodic assessment, as necessary)	58,755	61,687
Intangible Assets, Net (Including Goodwill), Total	$ 149,107	$ 149,499